Attack doctor dividing committee (7)
I believe the answer is:
bombard
'attack' is the definition.
(bombarding is a kind of attacking)
'doctor dividing committee' is the wordplay.
'doctor' becomes 'mb' (Bachelor of Medicine, Medicinae Baccalaureus).
'dividing' is an insertion indicator.
'committee' becomes 'board' (board is a kind of committee).
'mb' put within 'board' is 'BOMBARD'.
(Other definitions for bombard that I've seen before include "Attack with missiles" , "Batter heavily and persistently" , "Pelt with missiles" , "Attack persistently" , "Organ stop" .)