Prince, for one
I believe the answer is:
heir
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">prince for one</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 heir that I've seen before include "Acknowledged beneficiary" , "One who inherits" , "Treasured family possession" , "One who will succeed to title" , "Person who inherits" .)