Harbour drink left (4)
I believe the answer is:
port
I believe this clue is a triple definition!
'harbour' is the first definition.
(I've seen this before)
'drink' is the second definition.
(port is a kind of drink)
'left' is the third definition.
(left side of a ship - opposite of starboard)
(Other definitions for port that I've seen before include "Rio, perhaps" , "Light enough to carry" , "Opposite of starboard" , "Stanley perhaps" , "Bordeaux, say" .)