Aerobics gear (8)
I believe the answer is:
leotards
'aerobics gear' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for leotards that I've seen before include "Clothing for acrobats" , "Garments worn by dancers" , "Garments for gymnasts" , "One-piece ballet garments" , "One-piece garments for dancing and exercise" .)