Scoff all is in ruins apart from Belgium (3,2)
I believe the answer is:
eat up
'in ruins apart from belgium' is the definition.
I can't judge whether this defines the answer.
'scoff all' is the wordplay.
I cannot really see how this works, but
'scoff' could be 'eat' (I've seen this before) and 'eat' is found in the answer.
The remaining letters 'up' is a valid word which might be clued in a way I don't see.
This may be the basis of clue (or it may be nonsense).
'is' acts as a link.
Can you help me to learn more?
(Other definitions for eat up that I've seen before include "Devour entirely" , "Exhaust" , "Consume completely" , "Consume, absorb" , "show good appetite" .)