Behold best recipe with right seafood (7)
I believe the answer is:
lobster
'seafood' is the definition.
(I know that lobster is a type of seafood)
'behold best recipe with right' is the wordplay.
'behold' becomes 'lo' (archaic exclamation meaning 'look!').
'recipe with' indicates an anagram.
'right' becomes 'r' (common abbreviation).
'best' anagrammed with 'r' can make 'bster'.
'lo'+'bster'='LOBSTER'
(Other definitions for lobster that I've seen before include "Slow bowler may be" , "Large marine decapod" , "Bolster up the sea-creature" , "Crustacean caught in pot" , "could find this on the table" .)