Crossword Genius

The , comic book character, alter ego Jay Garrick, who first appeared in 1940 (5)

Ross

I believe the answer is:

flash

(Other definitions for flash that I've seen before include "Brief burst of light" , "Quick burst of light" , "Scintillate" , "type of photography" , "Gaudy" .)

I've seen this clue in The Mirror.
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