Tory's struggling to eat English seafood (6)
I believe the answer is:
oyster
'seafood' is the definition.
(oyster is a type of seafood)
'tory's struggling to eat english' is the wordplay.
'struggling' is an anagram indicator (the letters struggle or wriggle into a new form).
'to eat' indicates putting letters inside.
'english' becomes 'E' (abbreviation).
'torys' anagrammed gives 'oystr'.
'oystr' going around 'e' is 'OYSTER'.
(Other definitions for oyster that I've seen before include "the world may be yours" , "Bivalve - may be pearl carrier" , "Bivalve native" , "Source of natural pearls" , "rather grey" .)