| Protein from which hair, nails and feathers are made | 
            The Times Specialist | 
            08 Sep 2025 | 
          
          
            | Kite ran out of protein (7) | 
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            | Protein in nails and hair | 
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            | Material for nails a tinker ordered? | 
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            | Fibrous protein in hair and nails (7) | 
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            | Protein for people out to tear around! (7) | 
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            | Substance of which hair and fingernails are composed | 
            The Times Concise | 
            13 Jan 2025 | 
          
          
            | Essential ingredient of horn | 
            The Sun Mini | 
            14 Dec 2024 | 
          
          
            | Right intake needs to be fixed for fibrous protein | 
            The Times Cryptic | 
            01 Oct 2024 | 
          
          
            | Protein weaker at inner section (7) | 
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            | Fibrous protein forming the main structural constituent of hair (7) | 
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            | A tinker spattered substance in hair (7) | 
            The Guardian Cryptic | 
            07 Aug 2024 | 
          
          
            | Wonk finally given time can nail constituent | 
            The Times Cryptic | 
            01 Aug 2024 | 
          
          
            | Horny substance a tinker removed (7) | 
            Puzzler Cryptic | 
            18 May 2024 | 
          
          
            | Protein in skin, nails, etc | 
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            | Rake sorted out metal compound found in nails (7) | 
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            | Fibrous protein found in nails and hair (7) | 
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            | Fingernail's fibrous protein (7) | 
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            | Hair protein | 
            Mirror Quick | 
            20 Mar 2024 | 
          
          
            | New rake can provide protein | 
            Mirror Cryptic | 
            20 Mar 2024 | 
          
          
            | Protein that is the chief constituent of hooves and horns (7) | 
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            | Nail material | 
            New York Times | 
            17 Jun 2023 | 
          
          
            | Work colleague conclusively classifying short fibrous protein | 
            The Guardian Cryptic | 
            11 Apr 2022 | 
          
          
            | Protein in horns and hair | 
            New York Times | 
            16 Nov 2021 | 
          
          
            | Fingernail makeup | 
            Wall Street Journal | 
            09 Jan 2021 | 
          
          
            | Fingernail material | 
            Universal | 
            08 Aug 2020 | 
          
          
            | Protein from European rodent in family | 
            The Sun Two Speed | 
            09 Jul 2020 | 
          
          
            | Hair constituent | 
            The Sun Two Speed | 
            09 Jul 2020 | 
          
          
            | Protein found in hair and nails | 
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            | Protein in horns and hair | 
            Canadiana | 
            22 Jul 2019 | 
          
          
            | Protein found in hair and hooves | 
            New York Times | 
            07 Jul 2019 | 
          
          
            | Protein found in hair and nails | 
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            | Protein found in hair and hooves | 
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            | Fibrous protein in the hair | 
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            | Protein in hair straighteners | 
            USA Today | 
            09 Jun 2017 | 
          
          
            | Squeal wearing Nike pants, it's in your hair  | 
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            | Protein found in hair and nails | 
            The Telegraph Quick | 
            14 Mar 2017 | 
          
          
            | Protein in hair straighteners | 
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            | Jack ultimately has age and can nail constituent | 
            The Telegraph Cryptic | 
            14 Dec 2016 | 
          
          
            | Makeup of some nails | 
            Wall Street Journal | 
            22 Sep 2016 | 
          
          
            | Horn material | 
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            | Fingernails, essentially | 
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            | Hair protein | 
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            | Protein in hair and nails | 
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            | Nail material | 
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            | Fingernail makeup | 
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            | A fibrous protein | 
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            | Fibrous protein | 
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            | Nail or horn base | 
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            | Fingernail component. | 
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            | Basis of horny tissue. | 
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            | Tissues of fingernails. | 
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