The most common and most likely answer to this crossword clue is the 8 letter word FIREWORK
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The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does FIREWORK mean?
FIREWORK noun- A device using gunpowder and other chemicals which, when lit, emits a combination of coloured flames, sparks, whistles or bangs, and sometimes made to rocket high into the sky before exploding, used for entertainment or celebration.