Glowing coal (5)
I believe the answer is:
ember
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">glowing coal</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for ember that I've seen before include "Wood still burning" , "It glows in dying fire" , "Glowing coal; type of goose" , "Piece of live coal" , "Still smouldering fragment of wood or coal" .)