Golfer's shirt, often (4)
I believe the answer is:
polo
'golfer's shirt often' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for polo that I've seen before include "Sport - mint - explorer" , "explorer of the thirteenth century" , "Pool (anag.)" , "A mint on horseback?" , "What riders might get up to in a team" .)