Related Clues:

• Revise for the better
• Strop
• Make a point of
• Polish, as one's skills
• Improve an edge
• Work on
• Coffee fineness setting
• Make more effective
• Sharpen 1-Across
• Workaday rut
• Opposite of dull
• Perfect one's skills
• Nine-to-five routine, to many
• Improve, as a skill
• Put to an oilstone