Related Clues:

• Apt rhyme of "Sweet!"
• "Slick"
• With 66-Across, "Good thinking!"
• Like a freshly cleaned room
• Cleaned up and arranged nicely
• 'Dope!'
• Like Scotch served without ice
• Concise — methodical
• Without "rocks"
• Adroit, as a trick
• Told editor to support book
• Served without ice, at a bar
• Without rocks, in a bar
• __ as a pin
• “Cool beans!”