Related Clues:

• Make a knife sharp
• Barbershop tool
• Make more efficient
• Get to the point?
• Sharpen, as a skill
• Barber belt
• It gives a barber an edge
• Leather band
• Strop it!
• Revise for the better
• Beltlike sharpener
• Strop
• Polish, as one's skills
• It may be a piece of leather
• Improve an edge