The car doesn’t have its brake on (5)
I believe the answer is:
rolls
'the car' is the definition.
(I have seen 'Posh car' mean 'rolls' so perhaps 'car' could also mean 'rolls')
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for rolls that I've seen before include "Bread portions" , "Overturns -- luxury car" , "breakfast food" , "flash car" , "Luxury car - lists of names" .)