Mother’s wise doctor (7)
I believe the answer is:
massage
'doctor' is the definition.
(both can mean to manipulate figures or information)
'mother's wise' is the wordplay.
'mother's' becomes 'mas' (Ma is another word for mother or mum).
'wise' becomes 'sage' (similar in meaning).
'mas'+'sage'='MASSAGE'
(Other definitions for massage that I've seen before include "Present favourably" , "Knead" , "Rub to relieve pain" , "Manipulate the muscles" , "See 10" .)