Minuteman's hat (7)
I believe the answer is:
tricorn
'minuteman's 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 "Three-cornered, hat perhaps" , "Cocked hat with brim turned up on three sides" , "head wear" , "Hat with upturned brim" , "headgear" .)