Throne claimant; pseudo (9)
I believe the answer is:
pretender
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">throne claimant</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >'<span class="explanation-format__original">pseudo</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ ></span>
(Other definitions for pretender that I've seen before include "Claimant to a throne, usually without just title" , "fake" , "One who claims a title or position" , "One claiming a title" , "One acting" .)