Vehicle’s trail almost going over hill (7)
I believe the answer is:
tractor
'vehicle's' is the definition.
(tractor is a kind of vehicle)
'trail almost going over hill' is the wordplay.
'trail' becomes 'track' (synonyms).
'almost' means to remove the last letter (most of the word but not all of it).
'going over hill' becomes 'tor' (I can't justify this - if you can you should believe this answer much more).
'track' with its final letter taken off is 'trac'.
'trac'+'tor'='TRACTOR'
Can you help me to learn more?
(Other definitions for tractor that I've seen before include "Agricultural vehicle" , "Vehicle used for hauling heavy loads" , "Vehicle for pulling farm machinery" , "Powerful farm vehicle for heavy work" , "Vehicle for pulling others" .)