Pretentious claim keeping doctor in charge (9)
I believe the answer is:
bombastic
'pretentious' is the definition.
(I've seen this before)
'claim keeping doctor in charge' is the wordplay.
'claim' becomes 'boast' (I can't justify this - if you can you should give a lot more credence to this answer).
'keeping' means one lot of letters goes inside another (some letters kept inside).
'doctor' becomes 'MB' (Bachelor of Medicine, Medicinae Baccalaureus).
'in charge' becomes 'ic' (abbreviation for 'in charge').
'boast' going around 'mb' is 'bombast'.
'bombast'+'ic'='BOMBASTIC'
Can you help me to learn more?
(Other definitions for bombastic that I've seen before include "I cast bomb, being pompous in speech" , "affected" , "Bimbo acts in boastful way" , "Extravagant" , "High-flown" .)