More important work for seafood chef? (6,4,2,3)

'chef?' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.

'more important work for seafood' is the wordplay.
I cannot quite understand how this works, but
'important' could be 'big' (similar in meaning) and 'big' is found within the answer.
an anagram of 'for' is 'ofr' which is located in the answer.
'seafood' could be 'fish' (fish is a kind of seafood) and 'fish' is present in the answer.
This explanation may well be incorrect...

Can you help me to learn more?