Related Clues:

• "The Name of the Rose" author
• Prefix with tourism
• One who isn't 'clean'
• Abstainer's opposite
• Not an abstainer
• One to whom a warranty applies
• Person on a terminal
• Best-selling author Umberto
• ___ group (computer info source)
• Friendly intro?
• 'Baudolino' author
• Software license party
• "The Name of the Rose" writer Umberto
• Techie's client
• Techie's customer