Also known as wheels (3)
I believe the answer is:
car
'wheels' is the definition.
(wheels can informally mean a car)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for car that I've seen before include "Passenger vehicle" , "Four-wheeled vehicle" , "Railway carriage; vehicle" , "saloon perhaps" , "Means of transport" .)