Related Clues:

• 'Gnarly!'
• Spick-and-span
• Quick on the uptake
• Straight up
• Type of tone
• "Wow!"
• Well-dressed
• Bang-up
• In good order
• 'Peachy!'
• Tacky?
• 'Sounds swell!'
• 'Snazzy!'
• "Swell!"
• Like Mensa members