"I ne'er saw true beauty till this night” speaker (5)

I believe the answer is:

romeo

(Other definitions for romeo that I've seen before include "Comms code for R" , "Juliet's swain" , "A great lover" , "Star-crossed lover" , "Amorous male" .)

I've seen this clue in The Wall Street Journal.

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.