Exploding, no star is lighter! (8)
I believe the answer is:
arsonist
'lighter' is the definition.
(I've seen this before)
'exploding no star is' is the wordplay.
'exploding' is an anagram indicator.
'no'+'star'+'is'='nostaris'
'nostaris' with letters rearranged gives 'ARSONIST'.
(Other definitions for arsonist that I've seen before include "Incendiary, firebug" , "Like blazes he will" , "One firing property" , "One who maliciously burns property" , "Criminal fire-raiser" .)