White-hot (12)
I believe the answer is:
incandescent
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">white-hot</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for incandescent that I've seen before include "Dazzling" , "Glowing hot" , "Brilliant" , "Hotly glowing bright" , "Furious" .)