Related Clues:

• Sharpen, as a knife
• Refine
• Sharpen, as one's skills
• Cutting edge creator
• Use a whetstone on
• Give an edge
• Improve, as skills
• Use a whetstone
• Perfect, as a skill
• Sharpen skills
• Practice, as skills
• Sharpen, as a blade
• Use a strop
• It'll give you an edge
• It'll give you the edge