Twilled suit fabric (5)
I believe the answer is:
serge
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">twilled suit fabric</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 serge that I've seen before include "Frenchman" , "Twilled woollen fabric" , "A twill fabric" , "Strong twilled worsted fabric" , "Twilled fabric; name" .)