Floppy top (5)
I believe the answer is:
beret
'floppy top' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for beret that I've seen before include "felt on one's head" , "Kind of floppy cap with no peak" , "Flattish round hat" , "Brimless French headgear" , "cover for commandos" .)