Vehicle, say, used in competition, reversing (6,3)
I believe the answer is:
estate car
'vehicle' is the definition.
(estate car is a kind of vehicle)
'say used in competition reversing' is the wordplay.
I cannot quite understand how this works, but
'say' could be 'state' ('state' can be a synonym of 'say') and 'state' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for estate car that I've seen before include "Capacious vehicle" , "Vehicle for passengers with goods" , "Vehicle with five doors" , "Motor vehicle" , "Brake" .)