Give licence to overtake (4)
I believe the answer is:
pass
I believe this clue is a double definition.
'give licence' is the first definition.
(as in passing or approving something)
'to overtake' is the second definition.
(as in passing on a road)
(Other definitions for pass that I've seen before include "failure in quiz" , "complimentary ticket" , "Bad situation" , "change" , "Hand over < identity card" .)