Go away from freight vehicle (3)
I believe the answer is:
car
'vehicle' is the definition.
(I know that car is a type of multi-track vehicle)
'go away from freight' is the wordplay.
'go away' becomes 'go' (going is a kind of going away).
'from' indicates named letters should be taken away.
'freight' becomes 'cargo' (synonyms).
'cargo' with 'go' taken away is 'CAR'.
(Other definitions for car that I've seen before include "Road vehicle; rail coach" , "Means of transport" , "Private transport" , "Personal vehicle" , "One for the road?" .)