Related Clues:

• Pre-Q queue
• Man's name that's an alphabetic string
• 18-20 in a sequence
• Three-time World Series of Poker champ ___ Ungar
• L-P links
• R-V hookup
• Disco ___ ('Simpsons' character)
• P preceders
• Q-U connection
• Disco ___, 'The Simpsons' character
• Telephone trigram
• 18 through 20, in a run
• They're ahead of U
• Pre-U trio
• String after Q