Bursts Into Flames, Perhaps Spontaneously

This page is the CodyCross answer for the clue below from Greece, Group 666, Puzzle 2 (Spartan Army).

Question is: Bursts Into Flames, Perhaps Spontaneously

and the answer is: COMBUSTS

Word Meaning:

COMBUSTS — third-person singular simple present indicative of combust

Definitions from Wiktionary.