One checking German car height? (7)
I believe the answer is:
auditor
'one checking german' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'car height?' is the wordplay.
'car' becomes 'audi' (Audi is a German car brand).
'height?' becomes 'tor' (I've seen this in another clue).
'audi'+'tor'='AUDITOR'
Can you help me to learn more?
(Other definitions for auditor that I've seen before include "Checker of books" , "one goes over watchfully" , "Account inspector" , "Listener; checker" , "Person who listens" .)