Matching cardigan and jumper (7)
I believe the answer is:
twinset
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">matching cardigan and jumper</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 twinset that I've seen before include "Matching cardigan and jumper when worn at the same time" , "Kit worn to match" , "clothing" , "Wear associated with pearls?" , "Matching cardigan and jumper worn together" .)