Homer's wife
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">homer's wife</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 marge that I've seen before include "Lover of Homer" , "Butter substitute (abbr)" , "Homer's wife" , "Butter-like spread" , "limit" .)