Bonfire sound (7)
I believe the answer is:
crackle
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bonfire sound</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for crackle that I've seen before include "Rustle loudly" , "Noise of interference" , "Snapping sound of a bonfire?" , "Noise of, eg, electrical discharge" , "The noise of burning wood, say" .)