Hospital doctor contributing to revolution, do we hear? (6)
I believe the answer is:
intern
'hospital doctor' is the definition.
'intern' can be an answer for 'doctor' (intern is a kind of doctor). I'm not sure about the 'hospital' bit.
'contributing to revolution do we hear?' is the wordplay.
'contributing to' becomes 'in' (I can't explain this - if you can you should give a lot more credence to this answer).
'revolution' becomes 'turn' (revolution can mean a turn or rotation).
'do we hear?' shows a homophone (sound like).
'turn' sounds like 'tern'.
'in'+'tern'='INTERN'
Can you help me to learn more?
(Other definitions for intern that I've seen before include "House officer" , "Put in prison" , "Incarcerate without trial - a junior hospital doctor?" , "to keep under lock and key" , "Imprison without trial - hospital junior doctor" .)