Sports clothing fabric (5)
I believe the answer is:
lycra
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sports clothing fabric</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 lycra that I've seen before include "Elasticated synthetic material" , "Sports clothing material" , "Sportswear fabric" , "clinging fabric" , "Material for exercise wear" .)