Car turns over (5)
I believe the answer is:
rolls
I believe this is a double definition.
'car' is the first definition.
(short for Rolls Royce)
'turns over' is the second definition.
('roll' can be a synonym of 'turn over')
(Other definitions for rolls that I've seen before include "Moves by turning" , "Car - goes with swaying motion" , "breakfast food" , "flash car" , "Small rounded bread pieces" .)