Fine wool source
I believe the answer is:
alpaca
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fine wool source</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for alpaca that I've seen before include "Woolly animal" , "South American relative of the llama" , "Silky cloth" , "woollen fabric" , "Wool of S American lama" .)