Crossword Genius

Unexpectedly present a twisty firework (7)

Ross

I believe the answer is:

serpent

'a twisty firework' is the definition.
(firework with a twisting motion)

'unexpectedly present' is the wordplay.
'unexpectedly' indicates an anagram.
'present' is an anagram of 'SERPENT'.

(Other definitions for serpent that I've seen before include "Malicious person" , "(In literature) a snake" , "Present for a snake" , "Large snake; sly person" , "Venomous snake" .)

I've seen this clue in The Guardian.
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