Related Clues:

• Make more acute
• One of a cube's 12
• Risky place to live?
• Good thing to have when competing
• Get sharp
• It might help you make the cut
• Brim
• Improve, as an edge
• Sharpen, as skills
• Keen quality
• Surface boundary
• Improve in small increments
• Part that's sharp
• Razor part
• Just squeeze by