Related Clues:

• Sound made when passing the sound barrier
• Good thing to end a close race with
• Burst of growth
• Cannon sound
• Economic prosperity
• Surge in sales
• Business owner's delight
• Burst of activity
• The noise of increased business activity?
• Time of great prosperity - hear the sound
• Period of prosperity or sonic sound
• Resonant sound, like artillery
• When business is great, opposite to bust
• Horizontal spar on board
• Big bang sound