Mutton neck, odd bits gone in dish (7)
I believe the answer is:
ramekin
'dish' is the definition.
(I know that ramekin is a type of dish)
'mutton neck odd bits gone in' is the wordplay.
I cannot really understand how this works, but
'in' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for ramekin that I've seen before include "Small ovenproof dish" , "pot" , "Small fireproof dish used for baking and serving food" , "Small baking dish for one portion" , "Small fireproof bowl" .)