Fine cotton thread or fabric (5)
I believe the answer is:
lisle
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">fine cotton thread</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">fabric</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(lisle is a kind of fabric)</span><br/ ><br/ ></span>
(Other definitions for lisle that I've seen before include "Fine smooth cotton thread for stockings" , "Strong twisted cotton thread for the strange Ellis" , "Strong cotton material" , "Cotton stocking thread" , "Twisted yarn" .)