Pot pie morsel (3)
I believe the answer is:
pea
'pot pie morsel' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for pea that I've seen before include "Small vegetable" , "Edible seed from pod" , "Little green vegetable" , "Common vegetable seed from pod" , "Leguminous vegetable" .)