The Norse god of thunder (4)
I believe the answer is:
thor
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">the norse god of thunder</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 thor that I've seen before include "Germanic deity" , "Scandinavian god of thunder and the weather" , "Imitative artistic work" , "Norse god wielding a hammer" , "Norse god of war" .)