The most common and most likely answer to this crossword clue is the 5 letter word BEBOP
I've seen this crossword clue in The Daily Telegraph
B
E
B
O
P
More clues leading to the result BEBOP
Buddy explains!
The straight part
We know that "jazz" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case jazz = bebop.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 BEBOP mean?
BEBOP noun- An early form of modern jazz played by small groups and featuring driving rhythms and complex, often dissonant harmonies.
- To participate in bebop jazz, such as by dancing in a way associated with the genre.
- (usually with a directional preposition) To walk in an easygoing, carefree manner.