Wee bite (3)
(Other definitions for morsel that I've seen before include "(Tasty) bit" , "A shred as of bread" , "Tiny piece" , "Just a fragment of food" , "Crumb" .)
'wee bite' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for nip that I've seen before include "Pinch or squeeze sharply" , "Pinch, short drink" , "Pinch, maybe in the bud" , "Pinch - tot" , "Light bite" .)