King's seat (6)
I believe the answer is:
throne
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">king's seat</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for throne that I've seen before include "Chair of the monarch" , "Seat of authority" , "Monarch's seat" , "Seat of royalty" , "A king or queen sits on it" .)