Pinch a drink (3)
I believe the answer is:
nip
I believe this is a double definition.
'pinch' is the first definition.
(nip can mean to pinch or bite)
'a drink' is the second definition.
(I've seen this before)
(Other definitions for nip that I've seen before include "Pinch using pin" , "Shot" , "Pinch or squeeze sharply" , "Quick, sharp, bite" , "Pinch; bite" .)