Wolfram (8)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">wolfram</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for tungsten that I've seen before include "Element used in electric light filaments" , "Steel-grey metal" , "Rare metallic element" , "Chemical element, symbol W" , "Metallic element used for lamp filaments" .)