Raging fire (7)
I believe the answer is:
inferno
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">raging fire</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for inferno that I've seen before include "Hellish conflagration" , "Huge fire" , "Where Satan lives and sinners go" , "Intense and uncontrolled fire" , "Fierce fire" .)