Contrive a plan, for instance, to reverse vehicle (9)
I believe the answer is:
hatchback
'vehicle' is the definition.
(hatchback is a kind of vehicle)
'contrive a plan for' is the wordplay.
'contrive' becomes 'hatch' (I've seen this in another clue).
'a plan for' becomes 'back' (I can't explain this - if you can you should give a lot more credence to this answer).
'hatch'+'back'='HATCHBACK'
'instance to reverse' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for hatchback that I've seen before include "Vehicle" , "transport" , "Car with sloping rear boot" , "Type of car with sloping rear car door" , "Style of '5-door' car" .)