Ballerina's attire
I believe the answer is:
tutu
'ballerina's attire' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for tutu that I've seen before include "Archbishop Desmond" , "Ballerina's costume" , "Ballerina's stiff skirt" , "North African nation" , "Short dress" .)