One animated little firework (8)

I believe the answer is:

sparkler

I'm a little stuck... Click here to teach me more about this clue!

'firework' is the definition.
(sparkler is a kind of firework)

I cannot understand how the rest of the clue works.

(Other definitions for sparkler that I've seen before include "Hand-held firework" , "Bright gem" , "Diamond (colloq.)" , "Slow-burning firework and a diamond" , "Firework or diamond ring" .)

I've seen this clue in The Guardian.

Want a hint initially instead of a full solution? Install my app