Live wire possible cause of ignition? (6,5)
I believe the answer is:
bright spark
If this is the answer, I'm afraid I cannot explain it.
Can you help me to learn more?
(Other definitions for bright spark that I've seen before include "Clever person" , "Someone who appears (irritatingly?) clever" , "One full of ideas" , "one who has many good ideas" , "Lively and clever individual" .)