| Clue | Source | Date |
|---|---|---|
| Cores | LA Times Daily | 02 May 2021 |
| Cell centers | The Washington Post | 28 Mar 2021 |
| Chromosome containers | Wall Street Journal | 02 Feb 2021 |
| Protons' places | Universal | 06 Jan 2021 |
| Atom centers | Thomas Joseph | 01 Aug 2020 |
| Atom cores | The Times Concise | 05 Sep 2019 |
| More than one central part in clue to be solved | The Telegraph Cryptic | 11 May 2019 |
| Atomic cores | The Times Concise | 25 Feb 2019 |
| Centers of atoms | New York Times | 28 Jan 2019 |
| Atomic centers | Universal | 28 Sep 2018 |
| Central parts round which others are grouped | The Telegraph General Knowledge | 24 Jun 2018 |
| Cores of atoms | Irish Times Simplex | 25 Jan 2018 |
| Greek character removing lice from centres | The Sun Two Speed | 07 Dec 2017 |
| Cell-centres | The Sun Two Speed | 07 Dec 2017 |
| Centres of atoms | Irish Times Simplex | 05 Apr 2017 |
| Sound of new lice rambling in kernels | The Telegraph Toughie | 25 Jan 2017 |
| Most important bits involved in clue | The Times Cryptic | 15 Dec 2016 |
| Core groups? | Universal | 25 Aug 2016 |
| Centers | New York Times | 11 Oct 2015 |
| Central pieces revised in clue | The Telegraph Cryptic | 12 Apr 2015 |
| Molecule cores | Universal | 30 Jan 2015 |
| Cell parts | ||
| Central parts | ||
| Amoeba centers | ||
| Scientific centers? | ||
| Scientific research centers? | ||
| Proton sites | ||
| Kernels | ||
| Core group? | ||
| Centers of research | ||
| Centers of cells | ||
| Chromosome holders | ||
| Fissionable material | ||
| Physics centers | ||
| Cores. | ||
| Cell centers. | ||
| Centers of cells. |