Superman's alter ego (4)
I believe the answer is:
kent
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">superman's alter ego</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 kent that I've seen before include "Lear's faithful Earl" , "Canterbury's county" , "Home county" , "Part of 1 25 [KING LEAR]" , "Garden of England - Superman's family name" .)