Disbark in flames (6)
I believe the answer is:
alight
I believe this is a double definition.
'disbark' is the first definition.
(both can mean to leave a vehicle)
'in flames' is the second definition.
(I've seen this before)
(Other definitions for alight that I've seen before include "Descend from vehicle" , "Small restaurant" , "following action of arsonist?" , "(Of bird) settle" , "Dismount" .)