Fast burst of light (5)

I believe the answer is:

flash

(Other definitions for flash that I've seen before include "Ostentatious" , "Twinkling" , "Briefly shine, short flood" , "Momentary brightness" , "Instant" .)

I've seen this clue in the Newsday.

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.