Doctor paid her to be a symbol of love (9)
I believe the answer is:
aphrodite
'a symbol of love' is the definition.
(goddess of love)
'doctor paid her to' is the wordplay.
'doctor' indicates anagramming the letters.
'paid'+'her'+'to'='paidherto'
'paidherto' is an anagram of 'APHRODITE'.
'be' acts as a link.
(Other definitions for aphrodite that I've seen before include "Atrophied (anag.)" , "Greek goddess of love, like Rome's Venus" , "Sex goddess" , "Greek version of Roman Venus" , "Greek goddess equivalent to Roman Venus" .)