Related Clues:

• Use a whetstone
• Perfect, as a skill
• Sharpen by rubbing
• Perk up
• Sharpen skills
• Practice, as skills
• Hone
• Sharpen, as a blade
• Use a strop
• Make a finer point
• Make a point
• It'll give you an edge
• It'll give you the edge
• Stimulate, as an appetite
• Improve, as one's skills