Finish amount of food - some nerve (3,5)

'food some nerve' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.

'finish amount' is the wordplay.
I cannot really understand how this works, but
'finish' could be 'end' (synonyms) and 'end' is found in the answer.
'amount' could be 'plate' (plate is a kind of amount) and 'plate' is found in the answer.
This accounts for all the letters.
This explanation may well be incorrect...

'of' acts as a link.

Can you help me to learn more?