Related Clues:

• Improvisational style
• Scram ... or a hint to solving 17-, 20-, 50- and 57-Across and 11- and 28-Down
• Make a run for it
• Mel Torme specialty
• 'Get lost!'
• Ella's specialty
• "Vamoose!"
• Jazz singing style
• "Skedaddle"
• Ella's thing
• 'Git out!'
• Get lost
• Get lost!
• Ella's music
• Some jazz singing