Golf supporter has drink reportedly (3)
I believe the answer is:
tee
'golf supporter' is the definition.
(I've seen this in another clue)
'drink reportedly' is the wordplay.
'drink' becomes 'tea' (tea is a kind of drink).
'reportedly' shows a homophone (sound like).
'tea' is a homophone of 'TEE'.
'has' is the link.
(Other definitions for tee that I've seen before include "Golfing item" , "Stand" , "support of leisure activity" , "Start of a hole in golf" , "Golf-peg" .)