Related Clues:

• One who isn't 'clean'
• Abstainer's opposite
• Not an abstainer
• One to whom a warranty applies
• Iniquity
• Person on a terminal
• ___ group (computer info source)
• Aficionado
• Friendly intro?
• Software license party
• Techie's client
• Techie's customer
• -- -friendly
• Software buyer
• Exploiting sort