Dynast (5)
I believe the answer is:
ruler
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">dynast</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 ruler that I've seen before include "Queen, perhaps" , "One who holds sway and effects government" , "person holding sway?" , "Potentate" , "Queen, say" .)