Accident with lighter (5)
I believe the answer is:
spill
I believe this clue is a double definition.
'accident' is the first definition.
(I've seen this before)
'lighter' is the second definition.
(strip of wood for lighting a candle)
'with' is the link.
(Other definitions for spill that I've seen before include "to make light of?" , "Overturn" , "Taper; slop" , "Waste (liquid)" , "Accidentally cause to overflow" .)