Small piece of food (6)
'small piece of food' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for morsel that I've seen before include "Small bit of food" , "Small amount of food, a bite" , "Tiny piece" , "Tasty little piece" , "a little food" .)
(Other definitions for titbit that I've seen before include "Choice item" , "Choice bit of something, food or gossip" , "Choice piece, food or gossip" , "Pleasing scrap of gossip" , "Small item of gossip" .)
(Other definitions for crumb that I've seen before include "A tiny bit of bread" , "Fragment of cake, bread" , "tiny amount" , "Very small quantity of something, especially food" , "Just a little bit" .)