Related Clues:

• Implements
• Makes keener
• Many hints in 'Hints From Heloise'
• Makes sharp
• Works on
• Basic customs
• Zeros (in on)
• Practical applications
• Finds a function for
• Utilizes
• Makes sharper
• Chews up and spits out
• Sharpens the edge of
• Spends
• Part of Silly Putty instructions