| Zinc __ | LA Times Daily | 30 Oct 2025 | 
          
            | Iron __: rust | LA Times Daily | 20 Oct 2025 | 
          
            | Nitrous ___ (laughing gas) | New York Times Mini | 17 Oct 2025 | 
          
            | Rust, for one | Thomas Joseph | 02 Oct 2025 | 
          
            | Zinc __ ointment | Newsday | 16 Sep 2025 | 
          
            | Neat plan detailed to produce chemical compound | The Telegraph Cryptic | 12 Sep 2025 | 
          
            | Nitrous ___ (laughing gas) |  |  | 
          
            | Rust is an example |  |  | 
          
            | Substance such as laughing gas or rust | The Times Specialist | 23 Jun 2025 | 
          
            | Zinc... (sunscreen ingredient) (5) |  |  | 
          
            | Into box ideally put chemical compound (5) |  |  | 
          
            | See 9 Across | Mirror Quiz | 26 Apr 2025 | 
          
            | Rust, for instance, is thus featuring some team of cricketers in a poem (5) |  |  | 
          
            | Iron ___ (basis of some pigment powders) |  |  | 
          
            | Water perhaps over by fish | The Sun Two Speed | 03 Apr 2025 | 
          
            | Compound | The Sun Two Speed | 03 Apr 2025 | 
          
            | Cow skin, says the Eastender, has only two elements (one oxygen) (5) |  |  | 
          
            | Rust, for one | Thomas Joseph | 11 Mar 2025 | 
          
            | Chemical compound of beef and fish |  |  | 
          
            | Zinc ___ ointment | Newsday | 26 Feb 2025 | 
          
            | See 50-Down | New York Times | 22 Jan 2025 | 
          
            | Compound of oxygen and other element (5) |  |  | 
          
            | Eleven in rhyme about chemical compound (5) |  |  | 
          
            | Rust, for one | LA Times Mini | 25 Dec 2024 | 
          
            | Iron - (rust) | Premier Sunday | 15 Dec 2024 | 
          
            | Rust the poor ox could die with? (5) |  |  | 
          
            | Iron ___ (rust) |  |  | 
          
            | Iron ____, rust | The Telegraph Plusword | 28 Nov 2024 | 
          
            | Any compound of oxygen |  |  | 
          
            | Word after "iron" or "nitrous" | Universal | 23 Nov 2024 | 
          
            | Rust, for instance | Universal | 18 Nov 2024 | 
          
            | Compound made from Cockney cow leather we hear (5) |  |  | 
          
            | Chemical compound kept in the box, ideally (5) |  |  | 
          
            | Rust or alumina | Universal | 31 Oct 2024 | 
          
            | Compound made of oxygen and another element (5) |  |  | 
          
            | Chemical compound containing oxygen (5) |  |  | 
          
            | Oxygen-containing compound |  |  | 
          
            | Rust or lime | Universal | 17 Sep 2024 | 
          
            | Laughing gas or quicklime | New York Times | 08 Sep 2024 | 
          
            | Iron __ (rust) | Newsday | 03 Sep 2024 | 
          
            | Rust, for one | Thomas Joseph | 08 Aug 2024 | 
          
            | Nitrous ___ (laughing gas) |  |  | 
          
            | Chemical compound made bovine creature die out (5) |  |  | 
          
            | In the box I deposited a chemical compound (5) |  |  | 
          
            | Carbon mon___ |  |  | 
          
            | Compound a poem about the team |  |  | 
          
            | Rust, for one | Thomas Joseph | 15 May 2024 | 
          
            | Removing lid of box, aide finds chemical compound |  |  | 
          
            | Zinc ___ (sunscreen ingredient) | LA Times Mini | 09 May 2024 | 
          
            | Carbon di___ |  |  | 
          
            | Corundum, for one | Thomas Joseph | 18 Apr 2024 | 
          
            | In the box I delivered a chemical compound (5) |  |  | 
          
            | Zinc __ ointment | Newsday | 12 Mar 2024 | 
          
            | Binary compound formed by the reaction of oxygen with another element (5) |  |  | 
          
            | Nitrous ___ (laughing gas) | LA Times Mini | 05 Feb 2024 | 
          
            | O compound (5) |  |  | 
          
            | O compound | The Guardian Quick | 23 Jan 2024 | 
          
            | See 57 Down | Newsday | 30 Nov 2023 | 
          
            | What 'O' might mean |  |  | 
          
            | Iron __: rust | LA Times Daily | 21 Nov 2023 | 
          
            | Rust compound | Thomas Joseph | 10 Nov 2023 | 
          
            | Zinc __: sunblock ingredient | LA Times Daily | 01 Nov 2023 | 
          
            | Iron ___ (rust, e.g.) | Universal | 27 Aug 2023 | 
          
            | Chemical that removes hard bit from leather | The Guardian Cryptic | 20 Mar 2023 | 
          
            | Rust, for one | Eugene Sheffer | 06 Jan 2023 | 
          
            | Nitrous ___ (laughing gas) |  |  | 
          
            | Iron ore, typically | Newsday | 24 Nov 2022 | 
          
            | Nitrous ___ (laughing gas) |  |  | 
          
            | Rust, for one | Thomas Joseph | 08 Sep 2022 | 
          
            | Rust compound | Thomas Joseph | 22 Aug 2022 | 
          
            | Lime or rust | Universal | 17 Aug 2022 | 
          
            | Compound with oxygen | The Telegraph Quick | 10 Jul 2022 | 
          
            | Rust | LA Times Daily | 24 Jun 2022 | 
          
            | Zinc or Nitrous follower |  |  | 
          
            | Zinc ___ (sunscreen additive) | Universal | 28 Apr 2022 | 
          
            | Corundum, for one | Wall Street Journal | 13 Apr 2022 | 
          
            | Rust, for one | Thomas Joseph | 26 Mar 2022 | 
          
            | Compound in hydrogen-depleted animal skin | The Times Cryptic | 04 Mar 2022 | 
          
            | Skin of cattle in East End compound |  |  | 
          
            | Rust, for one | Thomas Joseph | 14 Jan 2022 | 
          
            | Rust compound | Thomas Joseph | 29 Nov 2021 | 
          
            | "Zinc" or "nitrous" follower | Universal | 22 Oct 2021 | 
          
            | Corundum, for one | Thomas Joseph | 10 Sep 2021 | 
          
            | Rust compound | Thomas Joseph | 23 Aug 2021 | 
          
            | Rust, for one | Thomas Joseph | 31 May 2021 | 
          
            | Corundum, for one | Thomas Joseph | 16 Jan 2021 | 
          
            | Zinc __ ointment | Newsday | 11 Nov 2020 | 
          
            | Chemical compound stored in box, I'd expect |  |  | 
          
            | Eg, rust | The Times Concise | 31 Aug 2020 | 
          
            | Rust, chemically | New York Times | 25 Aug 2020 | 
          
            | Rust, e.g., chemically | Universal | 06 Aug 2020 | 
          
            | Rust, for one | Eugene Sheffer | 29 May 2020 | 
          
            | Farm animal I'd put on drug, a chemical compound |  |  | 
          
            | Water, chemically | Newsday | 23 Apr 2020 | 
          
            | Compound such as rust | The Times Concise | 20 Apr 2020 | 
          
            | Nitrous ___ | The Washington Post Sunday | 08 Dec 2019 | 
          
            | Rust, e.g | USA Today | 01 Dec 2019 | 
          
            | Beast and fish compound |  |  | 
          
            | Nitrous ___ | Universal | 12 Jul 2019 | 
          
            | Many an ore | Newsday | 22 Jun 2019 | 
          
            | Zinc ___ | The Washington Post Sunday | 19 May 2019 | 
          
            | Lime, for one | Wall Street Journal | 11 May 2019 | 
          
            | Water or rust | New York Times | 14 Apr 2019 | 
          
            | Chemical making leather without using hydrogen | The Telegraph Toughie | 10 Apr 2019 | 
          
            | Lime, e.g | Wall Street Journal | 02 Mar 2019 | 
          
            | Nitrous __ | LA Times Daily | 11 Feb 2019 | 
          
            | Nitrous __ | The Washington Post | 11 Feb 2019 | 
          
            | Rust or lime | USA Today | 30 Jan 2019 | 
          
            | Rust or laughing gas, chemically | USA Today | 14 Jan 2019 | 
          
            | Rust, e.g | New York Times | 06 Jan 2019 | 
          
            | Rust or laughing gas, chemically |  |  | 
          
            | Rust or lime |  |  | 
          
            | Nitrous __ |  |  | 
          
            | Nitrous ___ |  |  | 
          
            | Rust, e.g. |  |  | 
          
            | Water or rust |  |  | 
          
            | Lime, e.g. |  |  | 
          
            | Lime, for one |  |  | 
          
            | Iron __ (rust) | Newsday | 26 Dec 2018 | 
          
            | Rust compound | Thomas Joseph | 17 Dec 2018 | 
          
            | Rust, e.g | The Washington Post Sunday | 02 Dec 2018 | 
          
            | Rust, for instance | Jonesin | 30 Oct 2018 | 
          
            | Zinc ___ | Universal | 24 Sep 2018 | 
          
            | Compound containing oxygen | The Telegraph General Knowledge | 23 Sep 2018 | 
          
            | Water, perhaps, over by fish |  |  | 
          
            | Rust, for example | LA Times Daily | 22 Jul 2018 | 
          
            | Rust, for example | The Washington Post | 22 Jul 2018 | 
          
            | Iron component | Universal | 22 Jun 2018 | 
          
            | Zinc ___ |  |  | 
          
            | Rust, for example |  |  | 
          
            | Iron component |  |  | 
          
            | Rust, for example | Newsday | 12 Nov 2017 | 
          
            | Nitrous ___ | Jonesin | 24 Oct 2017 | 
          
            | Corundum, e.g | Wall Street Journal | 20 Jul 2017 | 
          
            | What ''O'' might mean | Newsday | 07 Jul 2017 | 
          
            | Rust or lime, for example | Wall Street Journal | 26 Jun 2017 | 
          
            | Lines bounding cricket team's compound |  |  | 
          
            | Lines bounding cricket team's compound | The Times Cryptic | 16 May 2017 | 
          
            | Nitrous ___ | New York Times | 11 May 2017 | 
          
            | Nitrous ___ |  |  | 
          
            | Farm animal with papers heading for export to rusty compound | Irish Times Crosaire | 27 Dec 2016 | 
          
            | Word after "nitrous" or "iron" | Universal | 22 Dec 2016 | 
          
            | Quicklime or rust, chemically | USA Today | 02 Dec 2016 | 
          
            | Nitrous ___ (laughing gas) | Universal | 18 Nov 2016 | 
          
            | Sapphire, e.g | Wall Street Journal | 01 Oct 2016 | 
          
            | Ferric ___ (rust) | Universal | 12 Sep 2016 | 
          
            | Tarnish, chemically | USA Today | 24 Jul 2016 | 
          
            | Viridian or lime | Wall Street Journal | 14 Jul 2016 | 
          
            | Iron ___ (rust) | Universal | 29 Jun 2016 | 
          
            | Water, for one | The Washington Post | 11 May 2016 | 
          
            | Water, essentially | Newsday | 14 Apr 2016 | 
          
            | Nitrous ___ | The Washington Post | 07 Mar 2016 | 
          
            | Ethylene ___ | New York Times | 21 Feb 2016 | 
          
            | Word after "nitrous" or "iron" |  |  | 
          
            | Tarnish, chemically |  |  | 
          
            | Quicklime or rust, chemically |  |  | 
          
            | Ferric ___ (rust) |  |  | 
          
            | Rust, e.g. |  |  | 
          
            | Iron ___ (rust) |  |  | 
          
            | Nitrous ___ (laughing gas) |  |  | 
          
            | Nitrous ___ (laughing gas) | USA Today | 23 Nov 2015 | 
          
            | Rust, iron -- | The Telegraph Quick | 29 Sep 2015 | 
          
            | Quicklime, for one | Newsday | 15 Aug 2015 | 
          
            | Lime, e.g | New York Times | 13 Jun 2015 | 
          
            | Water, for instance | Newsday | 22 May 2015 | 
          
            | Papers found on the farm in the beginning beside Oriental rusty compound for one | Irish Times Crosaire | 18 May 2015 | 
          
            | O, as in ZnO | Newsday | 29 Jan 2015 | 
          
            | Bull's skin missing some heterocyclic compound |  |  | 
          
            | Water, for instance |  |  | 
          
            | Nitrous ___ (laughing gas) |  |  | 
          
            | Lime, e.g. |  |  | 
          
            | Nitrous ___ (laughing gas) |  |  | 
          
            | O, as in ZnO |  |  | 
          
            | Quicklime, for one |  |  | 
          
            | Zinc __ ointment |  |  | 
          
            | Rust or lime |  |  | 
          
            | Rust, e.g. |  |  | 
          
            | Zinc __ |  |  | 
          
            | Zinc __: sunblock ingredient |  |  | 
          
            | Rust, chemically |  |  | 
          
            | Rust, for one |  |  | 
          
            | Rusting agent |  |  | 
          
            | Ferric __ (rust) |  |  | 
          
            | Extract hydrogen from leather compound |  |  | 
          
            | Word with "zinc" |  |  | 
          
            | Rust, e.g. |  |  | 
          
            | Rust, e.g. |  |  | 
          
            | Rust, for example |  |  | 
          
            | Quicklime, e.g. |  |  | 
          
            | Rust or laughing gas |  |  | 
          
            | Compound containing the eighth element (yes, another chemistry clue) |  |  | 
          
            | Water, for one |  |  | 
          
            | Compound such as rust, to a chemist |  |  | 
          
            | Nitrous __ |  |  | 
          
            | Zinc ___ (lotion ingredient) |  |  | 
          
            | Nitrous __ (laughing gas) |  |  | 
          
            | Sapphire, for one |  |  | 
          
            | Rust, for one |  |  | 
          
            | Calcium ___ (lime ingredient) |  |  | 
          
            | Rust, for example |  |  | 
          
            | Compound France's 10-0 reverse with England's opener |  |  | 
          
            | Zinc ___ |  |  | 
          
            | Zinc ___ (sunblock substance) |  |  | 
          
            | Rust, say |  |  | 
          
            | Nitrous ___ |  |  | 
          
            | Rust, for one |  |  | 
          
            | Zinc ___ (sunblock substance) |  |  | 
          
            | Rust, say |  |  | 
          
            | Nitrogen ___ |  |  | 
          
            | Common compound |  |  | 
          
            | Laughing gas, for one |  |  | 
          
            | 6-Down, for one |  |  | 
          
            | Ferric ___ (rust) |  |  | 
          
            | Common compound |  |  | 
          
            | Rust, e.g |  |  | 
          
            | Rust or water, chemically |  |  | 
          
            | Rust, for instance |  |  | 
          
            | Rust, for one |  |  | 
          
            | Ferric ___ (rust component) |  |  | 
          
            | Iron ___ (rust) |  |  | 
          
            | Water, essentially |  |  | 
          
            | Zinc ___ (healing ingredient) |  |  | 
          
            | Nitrous -- |  |  | 
          
            | Iron __ |  |  | 
          
            | Common compound |  |  | 
          
            | Rust, for example |  |  | 
          
            | Ferric ___ (rust) |  |  | 
          
            | Word with "zinc" or "nitrous" |  |  | 
          
            | Laughing gas, e.g. |  |  | 
          
            | Iron __ |  |  | 
          
            | Nitrous -- (laughing gas) |  |  | 
          
            | Nitrous ___ |  |  | 
          
            | Zinc compound |  |  | 
          
            | Ferric ___ (rust component) |  |  | 
          
            | Laughing gas, for one |  |  | 
          
            | Rust or laughing gas |  |  | 
          
            | Water, for one |  |  | 
          
            | Lime or rust |  |  | 
          
            | Rust, actually |  |  | 
          
            | Iron ___ (rust) |  |  | 
          
            | Iron ___: rust |  |  | 
          
            | Rust component |  |  | 
          
            | Lime or rust, e.g. |  |  | 
          
            | Zinc ___ (ingredient in calamine) |  |  | 
          
            | Common compound |  |  | 
          
            | Rust, actually |  |  | 
          
            | Lime or rust, e.g. |  |  | 
          
            | Lime or rust |  |  | 
          
            | CO, e.g. |  |  | 
          
            | Common chemical compound |  |  | 
          
            | Nitrous ___ (laughing gas) |  |  | 
          
            | Rust, for example |  |  | 
          
            | Rust, for example |  |  | 
          
            | Word with zinc |  |  | 
          
            | Calcium ___ (lime) |  |  | 
          
            | Word with zinc or nitrous |  |  | 
          
            | Zinc __ |  |  | 
          
            | Deuterium ___ (heavy water) |  |  | 
          
            | Rust is one |  |  | 
          
            | Rust is one |  |  | 
          
            | Rust, tarnish, or laughing gas |  |  | 
          
            | Quicklime, e.g. |  |  | 
          
            | Zinc-____ |  |  | 
          
            | Rust, e.g. |  |  | 
          
            | Rust is one |  |  | 
          
            | Rust or lime |  |  | 
          
            | Philosopher's wool, for one |  |  | 
          
            | Rust, chemically |  |  | 
          
            | Rust or lime |  |  | 
          
            | Rust, for instance |  |  | 
          
            | Nitrous ___ (laughing gas) |  |  | 
          
            | Zinc ___ (sunblock substance) |  |  | 
          
            | Rusting agent |  |  | 
          
            | Corundum, for one |  |  | 
          
            | The O in FeO |  |  | 
          
            | Iron -- (rust) |  |  | 
          
            | Calcium __ (lime) |  |  | 
          
            | Rust, e.g. |  |  | 
          
            | Nitrous ___ (laughing gas) |  |  | 
          
            | Rust, for example |  |  | 
          
            | Deuterium ___ (heavy water) |  |  | 
          
            | NO, e.g. |  |  | 
          
            | Heavy water, for one |  |  | 
          
            | Iron or zinc follower |  |  | 
          
            | Quicklime, e.g. |  |  | 
          
            | Ferrite, for one |  |  | 
          
            | Laughing gas, for one |  |  | 
          
            | Ferric __ (Fe203) |  |  | 
          
            | Compound of oxygen |  |  | 
          
            | Rust, e.g |  |  | 
          
            | Nitrous _____ |  |  | 
          
            | Nitrous ___: anesthetic |  |  | 
          
            | Ferric ___: rust |  |  | 
          
            | Lime, for example |  |  | 
          
            | Lime or rust |  |  | 
          
            | Rust, for one |  |  | 
          
            | Chemical compound |  |  | 
          
            | Cause of rust |  |  | 
          
            | Rust, for example |  |  | 
          
            | Rust  in part |  |  | 
          
            | Zinc __ |  |  | 
          
            | Nitrous _____ (laughing gas) |  |  | 
          
            | Iron compound |  |  | 
          
            | Water or rust |  |  | 
          
            | Lime, for one |  |  | 
          
            | Quicklime  e.g. |  |  | 
          
            | Calx or corundum |  |  | 
          
            | Calcium ___ (lime ingredient) |  |  | 
          
            | Chemical compound |  |  | 
          
            | Iron ____ |  |  | 
          
            | Nitrous follower |  |  | 
          
            | Fe2 O3, e.g. |  |  | 
          
            | Binary compound |  |  | 
          
            | Iron or ethyl |  |  | 
          
            | Zinc ___ |  |  | 
          
            | Nitrous ____: laughing gas |  |  | 
          
            | Oxygen compound |  |  | 
          
            | Rust   e.g. |  |  | 
          
            | Word after iron or ethyl |  |  | 
          
            | Binary compound of oxygen |  |  | 
          
            | Ferric ___ (rust) |  |  | 
          
            | Rust or patina |  |  | 
          
            | Chemical compound |  |  | 
          
            | Iron ___ |  |  | 
          
            | Compound within rust |  |  | 
          
            | Word with zinc or mercury |  |  | 
          
            | Rust ingredient |  |  | 
          
            | Rust |  |  | 
          
            | What iron rust is, chemically. |  |  | 
          
            | Gaseous compound. |  |  | 
          
            | Chemical compound. |  |  | 
          
            | Ferric ___ |  |  | 
          
            | Hematite or limonite. |  |  | 
          
            | Chemlcal compound. |  |  | 
          
            | Nitrous ___ |  |  | 
          
            | Iron rust. |  |  | 
          
            | Zinc ___. |  |  | 
          
            | Magnetic tape coating. |  |  | 
          
            | Iron compound |  |  | 
          
            | Lime or rust, e.g. |  |  | 
          
            | Binary compound. |  |  |