Bloater's not a bad seafood option (7)
I believe the answer is:
lobster
'seafood option' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
'bloater's not a bad' is the wordplay.
'not' suggests deleting specific letters.
'bad' indicates an anagram.
'bloaters' with 'a' taken out is 'bloters'.
'bloters' anagrammed gives 'LOBSTER'.
Can you help me to learn more?
(Other definitions for lobster that I've seen before include "Pincered crustacean, a delicacy" , "Crustacean caught in pot" , "one to loft a > shellfish?" , "Lets bro have the shellfish" , "Slow bowler may be" .)