Soft fluffy wool (6)
I believe the answer is:
angora
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">soft fluffy wool</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for angora that I've seen before include "Goat producing mohair" , "Long-haired cat, goat, or rabbit" , "Yarn made from hair of goats or rabbits" , "Name of goat at 12 Across" , "Yarn or fabric made from goat hair" .)