Work of a doctor with officer before rehearsal (7,8)
I believe the answer is:
general practice
'work of a doctor' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.
'officer before rehearsal' is the wordplay.
'officer' becomes 'general' (general officer is a kind of officer).
'before' means one lot of letters go next to another.
'rehearsal' becomes 'practice' (I've seen this before).
'general'+'practice'='GENERAL PRACTICE'
'with' acts as a link.
Can you help me to learn more?
(Other definitions for general practice that I've seen before include "Where you find doctors" , "convention?" , "Work of a local doctor" , "should get lots of people fit" , "Treating business" .)