Here are the possible solutions for jazz player's phrase clue
Answer
Clue
Relevancy
riff
Clue
Jazz player's phrase
Jazz phrase
Repeated melodic phrase, in jazz
billrussell
Clue
Basketball player Walton + basketball player Westbrook = basketball player ___
kennyg
Clue
"For his contributions to jazz, ___ should be smeared with bacon grease, placed in a cage with three underfed Kodiak grizzly bears, and whatever happens, happens." ("Genius Guide to Jazz")
teams
Clue
Jazz and Blues, but not smooth jazz or jump blues, AFAIK