1) Alexandra, once 2) Catherine or Elizabeth 3) Czaritza 4) Female aristocrat 5) Obsolete title 6) One-time ruler 7) Russian empress 8) Russian royalty, pre-1917 9) Spouse of Ivan or Peter 10) The wife of a czar 11) The wife or widow of a czar 12) Tsarina 13) Tsaritsa 14) Tzarina 15) Winter palace resident Found on https://www.crosswordclues.com/clue/czarina
Cza·ri'na noun [ Confer German Zarin , Czarin , fem., Russian tsaritsa .] The title of the empress of Russia. Found on http://www.encyclo.co.uk/webster/C/212