Goes round in luxury car (5)
I believe the answer is:
rolls
I believe this clue is a double definition.
'goes round' is the first definition.
'luxury car' is the second definition.
(Rolls Royce)
'in' is the link.
(Other definitions for rolls that I've seen before include "Bread portions" , "documents" , "Baps - posh car" , "Car - goes with swaying motion" , "Official lists" .)