Horrible story about European seafood (6)
I believe the answer is:
oyster
'seafood' is the definition.
(oyster is a kind of seafood)
'horrible story about european' is the wordplay.
'horrible' is an anagram indicator.
'about' indicates putting letters inside.
'european' becomes 'e' (abbreviation e.g. EU).
'story' is an anagram of 'oystr'.
'oystr' going around 'e' is 'OYSTER'.
(Other definitions for oyster that I've seen before include "Pearl-yielding shellfish" , "Parent of the pearl" , "Edible marine mollusc" , "Succulent bivalve, may bear a pearl" , "Capital card" .)