Headwear for a white tie event (5)

I believe the answer is:

tiara

(Other definitions for tiara that I've seen before include "Jewelled coronet" , "Small crown" , "Ornamental crescent-shaped headdress or Pope's diadem" , "Top decoration" , "Crescent-shaped headdrsss or Pope's diadem" .)

I've seen this clue in the Universal.

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.