Fat from wool (7)
I believe the answer is:
lanolin
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fat from wool</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 lanolin that I've seen before include "Fatty substance on wool" , "Fat extracted from wool" , "Fatty coating on wool" , "Oil extracted from wool" , "Yellow viscous oil from animals -- in on all (anag)" .)