Related Clues:

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