Stretch material (5)
I believe the answer is:
lycra
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">stretch material</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for lycra that I've seen before include "gear for cyclists" , "Fabric used in tight-fitting cycling wear" , "Stretch fabric" , "Sportswear fabric" , "Sports clothing material" .)