Dodgy character stole flash motor (7,7)
I believe the answer is:
Here is my best explanation:
'flash motor' is the definition.
'dodgy character stole' is the subsidiary indication.
'dodgy' is an anagram indicator.
'characterstole' with letters rearranged gives 'chelseatractor'.
(Other definitions for chelsea tractor that I've seen before include "Huge 4WD" and "4wd".)