Broad-brimmed Mexican hat (8)
I believe the answer is:
sombrero
'broad-brimmed mexican hat' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for sombrero that I've seen before include "Broad-brimmed Mexican hat" , "headgear from Mexico" , "Hat for South American" , "Large hat from Mexico" , "Covering up" .)