Related Clues:

• "Whose Line Is It Anyway?" line
• Bit of flashy guitar work
• Riff on stage
• Off-the-cuff remark
• Repeated musical accompaniment
• A bit of jazz as a duty? No thanks!
• Speak without preparation
• Improvise one's lines
• Failing to start ribald dance without rehearsal
• Unscripted remark
• Short repeated jazz figure
• Not prepared to busk
• As much as you want
• It came from the performer's cuff
• Vamp has to make up