Went for a drive; may it have been clocked? (4,3)
I believe the answer is:
used car
'may it have been clocked?' is the definition.
(to clock a car is to falsely modify its milometer)
I can't explain the rest of the clue.
(Other definitions for used car that I've seen before include "Second-hand vehicle" , "Previously-owned motor" , "Second-hand motor" .)