Eastern royal (4)
I believe the answer is:
rani
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">eastern royal</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 rani that I've seen before include "Hindu queen or princess" , "Raja's wife" , "Rajah's wife from Iran" , "Indian queen" , "Wife of a raja" .)