Renounce one’s throne (8)
I believe the answer is:
abdicate
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">renounce one's throne</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for abdicate that I've seen before include "Renounce position or power" , "Give up a throne" , "Resign from the crown or major responsibility" , "Resign from or renounce the throne" , "Give up rule" .)