Tête toppers (6)
I believe the answer is:
berets
'tete toppers' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for berets that I've seen before include "Caps, hats" , "Soft flat caps" , "Soft caps with no brim" , "capital investments" , "Round flattish caps" .)