Off-road vehicle (4)
'off-road vehicle' is the definition.
(I know that Jeep is a type of off-road vehicle)
This is the entire clue.
(Other definitions for jeep that I've seen before include "Small four-wheel drive vehicle" , "Four-wheel-drive general purpose vehicle" , "Vehicle for rough terrain" , "Sturdy vehicle" , "Truck" .)
'off-road vehicle' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Another definition for dirt bike that I've seen is " scrambling machine".)