Related Clues:

• Sound of ... an explosion
• Dynamite sound
• Crane component
• Up time
• Ka-blam!
• 'Ka-blam!'
• Sonic --
• Upsurge
• Upsurge in activity
• Sound made when passing the sound barrier
• Cannon sound
• Economic prosperity
• Surge in sales
• Business owner's delight
• The noise of increased business activity?