Related Clues:

• Not quite right?
• Very perceptive
• Sharp, as wits
• Less than right?
• "Neato!"
• Well sharpened
• Peachy ___
• Piercing cry
• Sharp-edged
• Like an eagle's vision
• Well-sharpened
• Type of triangle
• Sharp, as an appetite
• Like angles less than 90 degrees
• Less than 90 degrees, in geometry