Animal hair (3)
I believe the answer is:
fur
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">animal hair</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for fur that I've seen before include "Animal pelt" , "Expensive coat; deposit in kettle" , "Eg, chinchilla" , "Hairy animal coat" , "Coating formed on tongue of sick person" .)