Related Clues:

• Sans ice
• 'Groovy!'
• Neato
• 'Swell!'
• 'I'm impressed!'
• Not having a hair out of place
• Calm and collected
• 'Rad!'
• ''Great!''
• Undiluted, as liquor
• Not 38-Across
• ''Peachy-keen!''
• A way to drink whiskey
• Expand
• 'Sounds good to me'