To give a conclusive demonstration, runs over doctor in Leith? (5,4)
I believe the answer is:
prove true
'to give a conclusive demonstration' is the definition.
I don't know anything about this answer so I cannot judge whether this works.
'runs over doctor in leith?' is the wordplay.
'runs over' becomes 'ro' (this could be a standard abbreviation which I don't know about).
'doctor' becomes 'vet' (vetting is a kind of doctoring).
'in' is an insertion indicator.
'leith?' becomes 'prue' (I've seen this before).
'ro'+'vet'='rovet'
'rovet' placed into 'prue' is 'PROVE TRUE'.
Can you help me to learn more?
(Another definition for prove true that I've seen is " Establish".)