Related Clues:

• Quickly increase in scale
• Rapidly increase in intensity
• Let a case get out of hand and snowball
• Breakup box behind schedule and it will go through the roof
• With 5-Across, fade
• Get out of control
• Increase rapidly in intensity
• "... how does your garden ___?"
• Develop argument after midnight
• Increase intensity of
• Mount with a castle, out East
• Develop; increase
• Rocket case needs repair - behind schedule
• Develop, increase
• Rapidly increase