"M*A*S*H" vehicle (4)
I believe the answer is:
jeep
'mash vehicle' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for jeep that I've seen before include "Vehicle for rough terrain" , "Small four-wheel drive vehicle" , "Sturdy vehicle" , "Army vehicle, 4-wheel drive" , "Truck" .)