Benefit of Japanese drink (4)
I believe the answer is:
sake
This clue is a double definition.
'benefit' is the first definition.
(I know that sake is a type of benefit)
'japanese drink' is the second definition.
(sake is a Japanese fermented beverage)
'of' is the link.
(Other definitions for sake that I've seen before include "Japanese spirit made from rice" , "Japanese rice alcohol" , "Jap. alcoholic drink from rice; for Pete's -" , "Benefit - behalf" , "account" .)