Answer, beginning with European goddess (7)
I believe the answer is:
astarte
'goddess' is the definition.
(thesaurus)
'answer beginning with european' is the wordplay.
'answer' becomes 'a' (abbreviation eg in Q and A).
'beginning' becomes 'start' (start is a kind of beginning).
'with' says to put letters next to each other.
'european' becomes 'e' (abbreviation e.g. EU).
'a'+'start'+'e'='ASTARTE'
(Other definitions for astarte that I've seen before include "Pagan deity" , "Phoenician love goddess" , "Mediterranean goddess" , "She might have helped with fertility problems" , "Ancient goddess" .)