Related Clues:
- Sharpen an axe blade
- Sharpen, like a skill
- Sharpen (with a whetstone)
- Sharpen, like an appetite
- Fine-tune over time
- Perfect gradually
- Sharpen, like skills
- Improve through practice
- Sharpen, as an axe
- Put an edge on a blade
- Stir grain, removing article
- Make sharper, as a knife edge
- Sharpen, as a sword's edge
- Take a strop to