Related Clues:

• Zeros (in on)
• Makes sharper
• Sharpens the edge of
• Cutting-edge creators
• Tweaks
• Uses a whetstone on
• Uses a whetstone
• Sharpens, as a razor
• Perfects
• Sharpens as with razor
• Sharpens on strap, say razor
• Sharpens on stone
• Sharpens as on whetstone
• Sharpens, like knife on stone
• Gives an edge to