Casual garments (1-6)
I believe the answer is:
t-shirts
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">casual garments</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 t-shirts that I've seen before include "Casual garments" , "Thirsts (anag)" , "clothes" , "Casual, collarless tops" , "Close-fitting casual tops" .)