Related Clues:

• Nervous, after "on"
• Bad thing to go over
• Innovative quality
• Put a sharper edge on
• Polish, as one's skills
• Stimulate (the appetite)
• Sharp part of a knife
• Advance gradually
• Word with ''jagged'' or ''ragged''
• Outskirts
• Tracing place
• Ax feature
• Boundary line
• Improve an edge
• Work on