Related Clues:

• Unmixed at a mixer
• Like some sums
• Neat as a pin
• Straight up or straightened up
• Well-kept
• "Cool!" old-style
• Nifty
• Straight in a snifter
• Considerable
• 'Way cool!'
• Undiluted, as whiskey
• Litter-free
• Clutter-free
• Natty
• Cool!