Hindu queen (4)
I believe the answer is:
rani
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hindu queen</span>' is the definition.<br/ ><span class="explanation-format__explanation">(historical term for a Hindu queen)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for rani that I've seen before include "Royal Indian female" , "Raja's wife" , "Wife of a raja" , "Indian princess" , "Raja's queen" .)