Knight stops looting for a quick bite (5)
I believe the answer is:
snack
'a quick bite' is the definition.
(I've seen this in another clue)
'knight stops looting' is the wordplay.
'knight' becomes 'n' (chess abbreviation).
'stops' is an insertion indicator (stopping can mean blocking a gap).
'looting' becomes 'sack' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'n' put within 'sack' is 'SNACK'.
'for' is the link.
Can you help me to learn more?
(Other definitions for snack that I've seen before include "Light bite" , "Elevenses?" , "Quick bite to eat" , "(Eat) a light meal" , "fast food" .)