Parking not easy to get in van or car (7)

I believe the answer is:

hardtop

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'car' is the definition.
(hardtop is a kind of car)

I can't explain the rest of the clue.

(Other definitions for hardtop that I've seen before include "Non-convertible car" , "Car's rigid roof" , "Car with a rigid top" , "Rigid-roofed vehicle" , "Style of car" .)

I've seen this clue in The Guardian.

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