Gin flavorer (4)
I believe the answer is:
sloe
'gin flavorer' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for sloe that I've seen before include "Black fruit" , "Sour blue-black fruit" , "Fruit steeped in gin to make a liqueur" , "Musical study" , "Wild plum" .)