Commit arson (5)
I believe the answer is:
torch
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">commit arson</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for torch that I've seen before include "Such a love song" , "Source of light" , "source of enlightenment" , "A large candle" , "Light carried in the hand" .)