Three-pointed hat (7)
I believe the answer is:
tricorn
'three-pointed hat' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for tricorn that I've seen before include "Type of cocked hat" , "head wear" , "Three-cornered, hat perhaps" , "headgear" , "Hat with upturned brim" .)