There’s potato in this pudding (4)
I believe the answer is:
spud
'there's potato in this pudding' is the definition.
The definition and answer can be both things that one consumes for nourishment as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'in this pudding' is the wordplay.
'in' indicates a hidden word.
'SPUD' can be found hidden inside 'this pudding'.
Can you help me to learn more?
(Other definitions for spud that I've seen before include "Vegetable" , "Weeding spade" , "short, stocky person" , "Tater" , "Potato (informal)" .)