Explorer Heyerdahl (4)
I believe the answer is:
thor
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">explorer heyerdahl</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for thor that I've seen before include "Norse hammer-wielding god" , "Mythical figure" , "Norse god of war" , "Norse god for whom Thursday is named" , "Comic superhero" .)