Title first used by Holy Roman Emperors (6)

I believe the answer is:

kaiser

(Other definitions for kaiser that I've seen before include "Ex-ruler of Germany" , "Old German emperor, pre-Hitler" , "Austrian bigwig" , "Emperor of Austria or Germany until 1918" , "Former German emperor" .)

I've seen this clue in The Times and The Sunday Times.

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.