Related Clues:

• No longer hot
• Under control
• In the 50's or 60's, say
• Chilly
• Awesome
• Informal affirmative
• 'Groovy!'
• 'You betcha'
• 'I see'
• 'I'm listening'
• Calm and collected
• 'Rad!'
• Not 38-Across
• Equivalent of a pitcher's nod to the catcher
• 'Sounds good to me'