Related Clues:

• Razor-sharp
• Calm and collected
• 'Rad!'
• ''Great!''
• Undiluted, as liquor
• Athletic
• Wail like a banshee
• Oily
• Not 38-Across
• Rad
• Very sensitive
• A way to drink whiskey
• Expand
• Not awkward
• 'Sounds good to me'