Related Clues:

• Alphabet trio
• Touch-tone 4
• Four, on the phone
• Phone trio
• 4, on a phone
• Alphabet run
• Telephone trio
• 4 on a phone
• Alphabetic trio
• Phone button letters
• Telephonic 4
• 4 on a fax machine
• F followers
• Letters seen next to a 4
• Letters on a phone's 4