Ballet skirts (5)
I believe the answer is:
tutus
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ballet skirts</span>' is the definition.<br/ ><span class="explanation-format__explanation">('tutu' can be a synonym of 'ballet skirt')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for tutus that I've seen before include "Ballet dresses" , "Ballet costumes" , "Ballet skirts" , "Certain dance outfits" , "Ballerinas' short skirts" .)