Go for a quick drink (3)
I believe the answer is:
nip
'quick drink' is the definition.
(I've seen this in another clue)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for nip that I've seen before include "Pinch using pin" , "small amount to drink" , "Feeling cold" , "severe cold" , "smart" .)