Related Clues:
- Perfect, as one's skills
- Sharpen, as an appetite
- Sharpen, as on a whetstone
- Work on the edge?
- Make perfect
- Make sharper
- Put to the grindstone
- Give the edge to?
- Work on the edge
- Apply to a whetstone
- Get sharp
- It might help you make the cut
- Improve, as an edge
- Sharpen, as skills
- Improve in small increments