Related Clues:

• Aloof
• 'Outta sight!'
• Chilled
• Just ducky
• Swell
• 'Peachy'
• Fan
• No longer hot
• Under control
• In the 50's or 60's, say
• 'That's amazing!'
• 'Keen!'
• Chilly
• Awesome
• 'Totally cool!'