Garment worn by footballers for shooting expedition (6)
I believe the answer is:
safari
'shooting expedition' is the definition.
'garment worn by footballers' is the wordplay.
'garment' becomes 'sari' (sari is a kind of garment).
'worn by' indicates putting letters inside (I've seen this in other clues).
'footballers' becomes 'FA' (Football Association abbreviation).
'sari' going around 'fa' is 'SAFARI'.
'for' is the link.
(Other definitions for safari that I've seen before include "African wildlife trip" , "Big game expedition" , "Hunting expedition (in Africa)" , "Big game trip" , "Expedition to see animals" .)