Related Clues:

• Make keener
• Make a point?
• Use a strop on
• Make a knife sharp
• Make more efficient
• Get to the point?
• Sharpen, as a skill
• Strop it!
• ___ one's appetite
• Revise for the better
• Strop
• Put a sharper edge on
• Make a point of
• Polish, as one's skills
• Stimulate (the appetite)