Go for a quick bite
I believe the answer is:
nip
'bite' is the definition.
(nipping is a kind of biting)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for nip that I've seen before include "smart" , "A small whisky" , "Swift bite" , "small draught" , "Pinch, short drink" .)