Crossword Genius

Nonexploding firework (3)

Ross

I believe the answer is:

dud

(Other definitions for dud that I've seen before include "Not working" , "Palindrome for a flop" , "Just a palindromic flop" , "Failed, worthless thing" , "Firework not going up" .)

I've seen this clue in the Penny Press.
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