Throw rest out and get some seafood (7)
I believe the answer is:
lobster
'some 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 anagramming the letters (out can mean wrong or inaccurate).
'rest' with letters rearranged gives 'ster'.
'lob'+'ster'='LOBSTER'
'and get' acts as a link.
(Other definitions for lobster that I've seen before include "Slow bowler may be" , "Lets bro have the shellfish" , "one for the pot?" , "Seafood" , "Eight-legged shellfish, scarlet when boiled" .)