Gay guys initially in for drink (4,3)
I believe the answer is:
pink gin
'drink' is the definition.
(I've seen this before)
'gay guys initially in' is the wordplay.
'gay' becomes 'pink' (can mean associated with gay people).
'initially' indicates taking the first letters.
The first letter of 'guys' is 'g'.
'pink'+'g'+'in'='PINK GIN'
'for' acts as a link.
(Other definitions for pink gin that I've seen before include "Angostura-flavoured drink" , "Kingpin (anag.)" , "Drink with 9" , "Alcoholic drink" , "Geneva and bitters" .)