Russian empress (7)
I believe the answer is:
tsarina
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">russian empress</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for tsarina that I've seen before include "Foreign ruler" , "Wife of former Russian ruler" , "Russian noblewoman" , "Nicholas's wife" , "Consort" .)