Related Clues:

• Code word?
• Not a thing
• Piquant flavor
• Grated citrus rind
• Bit of rind
• Five-digit number on an envelope
• It may be found in a snap
• Con ___ (with vigor, in music)
• Great enthusiasm
• Citrus shaving
• Part of E=mc2
• Allegro con ___
• 12345, in Schenectady, N.Y.
• ___ code
• Shaving in the kitchen