Financial backer with a girl's name (6)
I believe the answer is:
angela
'girl's name' is the definition.
(I've seen this before)
'financial backer with a' is the wordplay.
'financial backer' becomes 'angel' (I've seen this before).
'with' says to put letters next to each other.
'angel'+'a'='ANGELA'
(Other definitions for angela that I've seen before include "- Gheorghiu, Romanian soprano" , "Girl's name" , "woman" , "Frau Merkel" , "-- Merkel, German Chancellor" .)