Ballet outfits (5)
I believe the answer is:
tutus
'ballet outfits' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for tutus that I've seen before include "Ballet skirts" , "Ballet costumes" , "Ballet dresses" , "Certain dance outfits" , "Ballerinas' short skirts" .)