Something tasty MP dipped in salt pot (7)
I believe the answer is:
crumpet
'salt pot' is the definition.
The answer and definition can be both things that one consumes for nourishment as well as being singular nouns.
Maybe you can see a link between them that I can't see?
'something tasty mp dipped in' is the wordplay.
'something tasty' becomes 'cruet' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'dipped in' means one lot of letters goes inside another.
'cruet' placed around 'mp' is 'CRUMPET'.
Can you help me to learn more?
(Other definitions for crumpet that I've seen before include "Thick soft porous cake - attractive person" , "Confection for toasting" , "Thick flat cake, eaten toasted" , "Thick, soft porous cake for toasting" , "hot stuff?" .)