Related Clues:

• Work on the edge?
• Make perfect
• Adjust slightly
• Make sharper
• Put to the grindstone
• Give the edge to?
• Apply to a whetstone
• Make more acute
• Get sharp
• It might help you make the cut
• Improve, as an edge
• Sharpen, as skills
• Change just a bit
• Slight adjustment
• Improve in small increments