Related Clues:

• Reduce to small particles by crushing
• Disliked duty
• Sharpen, as a knife edge
• Give a good tip?
• Sharpen, like a skill
• Sharpen (with a whetstone)
• What pepper mills do
• Fine-tune over time
• Perfect gradually
• Sharpen, like skills
• Improve through practice
• Give a point to clever men without marks
• Laborious routine in mill?
• Give more of a point to
• Sharpen, as an axe