Crossword Genius

Pre-1917 emperor (4)

Ross

I believe the answer is:

tsar

(Other definitions for tsar that I've seen before include "Supreme authority" , "Formal rulings on Islamic law; was aft (anag.)" , "Potentate" , "Ruler finally executed" , "Alexander and Nicholas held this title in Russia" .)

I've seen this clue in The Washington Post.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.