One-piece ballet garments (8)
I believe the answer is:
leotards
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">one-piece ballet garments</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for leotards that I've seen before include "One-piece ballet garments" , "One-piece garments for dancing and exercise" , "Garments for gymnasts" , "Theatrical attire" , "Clothing for acrobats" .)