Throw rest out as seafood (7)
I believe the answer is:
lobster
'seafood' is the definition.
(lobster is a kind of seafood)
'throw rest out' is the wordplay.
'throw' becomes 'lob' (lobbing is a kind of throwing**).
'out' indicates an anagram (out can mean wrong or inaccurate).
'rest' anagrammed gives 'ster'.
'lob'+'ster'='LOBSTER'
'as' is the link.
(Other definitions for lobster that I've seen before include "one to loft a > shellfish?" , "Bolster up the sea-creature" , "Lets bro have the shellfish" , "Bolster (anag.)" , "food?" .)