Leave vehicle in flames (6)
I believe the answer is:
alight
I believe this clue is a double definition.
'leave vehicle' is the first definition.
(eg alight can mean to disembark from a train)
'in flames' is the second definition.
(I've seen this before)
(Other definitions for alight that I've seen before include "Come to rest on the ground" , "Descend from vehicle" , "Small restaurant" , "(Of bird) settle" , "Come to rest, settle" .)