One who may vote (7)
I believe the answer is:
elector
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">one who may vote</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 elector that I've seen before include "Constituent" , "might he make one cross?" , "One entitled to vote" , "one with a voice" , "A prince of the Holy Roman Empire" .)