He obtains favours for doctor (8)

I believe the answer is:

procurer

'he obtains favours' is the definition.

'for doctor' is the wordplay.
'for' becomes 'pro' (I've seen this before).
'doctor' becomes 'curer' (I've seen this before).
'pro'+'curer'='PROCURER'

(Other definitions for procurer that I've seen before include "One acquiring" , "Pimp" , "Solicitor" , "One who obtains something" , "One getting" .)

I've seen this clue in The Guardian.

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