Related Clues:

• Really impress
• Impress
• 'Cool'
• Straight, at the bar
• Audible admiration
• Like good penmanship
• Aah partner
• "I'm impressed!"
• "Nifty!"
• Like a pin?
• Crowd's gasp
• Sound of amazement
• 'Isn't that pretty!'
• How Scotch may be served
• Fireworks sound