Related Clues:
- Pique, as one's appetite
- Sharpen — stimulate
- Polish term of affection? Not quite!
- Sharpen, as a sword edge
- Improve, as a blade edge
- Hard going by single file
- Perfect over time
- Perfect, as one's talents
- Fine tune
- Make an edge sharper
- To sharpen an implement, especially on a stone
- Refine over time
- Sharpen new garden tool outside
- Sharpen, as a sword
- Put a sharp edge on