Pinch small quantity of spirits (3)
I believe the answer is:
nip
This clue is a double definition.
'pinch' is the first definition.
(nip can mean to pinch or bite)
'small quantity of spirits' is the second definition.
(nip can mean a quantity of alcoholic spirits)
(Other definitions for nip that I've seen before include "pop and > have a bite" , "Feeling cold" , "Pinch; quantity of spirits" , "Catch" , "Pinch with small drink" .)