A goddess paid her to, in error (9)
I believe the answer is:
aphrodite
'a goddess' is the definition.
(thesaurus)
'paid her to in error' is the wordplay.
'in error' is an anagram indicator.
'paid'+'her'+'to'='paidherto'
'paidherto' is an anagram of 'APHRODITE'.
(Other definitions for aphrodite that I've seen before include "Paris gave her an apple" , "Greek goddess of beauty and love" , "Greek goddess of love, like Roman Venus" , "Greek goddess of love, like Rome's Venus" , "Greek goddess equivalent to Roman Venus" .)