Examiner’s car runs over detective (7)
I believe the answer is:
auditor
'examiner's' is the definition.
(an auditor examines accounts etc)
'car runs over detective' is the wordplay.
'car' becomes 'audi' (Audi is a German car brand).
'runs over' shows that the letters should be reversed in order (I've seen 'running over' mean this (the letters turn over to the opposite direction)).
'detective' becomes 'rot' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'rot' in reverse letter order is 'tor'.
'audi'+'tor'='AUDITOR'
Can you help me to learn more?
(Other definitions for auditor that I've seen before include "Accountant - listener" , "Financial checker" , "Money expert" , "Finance officer" , "Worker in accounts" .)