Move quickly to pinch a small quantity of spirits (3)
I believe the answer is:
nip
'small quantity of spirits' is the definition.
(nip can mean a quantity of alcoholic spirits)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for nip that I've seen before include "small draught" , "Pinch - tot" , "Pinch, maybe in the bud" , "Feeling cold" , "Dash" .)