Scandinavian god of thunder (4)
I believe the answer is:
thor
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">scandinavian god of thunder</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 thor that I've seen before include "Germanic thunder god; early US IRBM" , "Scandinavian thunder-god" , "The Thunderer" , "Norse god of thunder - a weekday is named after him" , "Scandinavian god of thunder and the weather" .)