Related Clues:

• Improve, as one's skills
• Perfect, as one's skills
• Word with cutting or leading
• Advan-tage
• What a sphere lacks
• Stropping result
• Barely better
• Beat by a small margin
• Razor feature
• Sharpen, as an appetite
• Beat (out)
• Sharpen, as on a whetstone
• Beat slightly
• Barber's need
• Barber's tool