Sun hat; antelope (4)
I believe the answer is:
topi
I believe this is a double definition.
'sun hat' is the first definition.
(I've seen this in another clue)
'antelope' is the second definition.
(topi is a kind of antelope)
(Other definitions for topi that I've seen before include "Sun protection" , "Headgear" , "cover in the heat" , "Indian sun hat made with pith from sola plants" , "Item of clothing" .)