Mother comes back as well as a girl (6)
I believe the answer is:
amanda
'girl' is the definition.
'mother comes back as well as a' is the wordplay.
'mother' becomes 'ma' (ma can mean mother).
'comes back' says the letters should be written in reverse.
'as well as' becomes 'and' (I've seen this in another clue).
'ma' back-to-front is 'am'.
'am'+'and'+'a'='AMANDA'
(Other definitions for amanda that I've seen before include "Girl's name meaning lovable" , "Girl" , "F. name meaning lovable" .)