Pompous crow ringing doctor in charge (9)
I believe the answer is:
bombastic
'pompous' is the definition.
(thesaurus)
'crow ringing doctor in charge' is the wordplay.
'crow' becomes 'boast' (I've seen this before).
'ringing' means one lot of letters goes inside another.
'doctor' becomes 'mb' (Bachelor of Medicine, Medicinae Baccalaureus).
'in charge' becomes 'ic'.
'boast' placed around 'mb' is 'bombast'.
'bombast'+'ic'='BOMBASTIC'
(Other definitions for bombastic that I've seen before include "Pretentious" , "High-flown" , "Extravagant" , "affected" , "Pompous -- inflated" .)