Related Clues:

• Key letter
• Honor society letter
• 21st Greek letter
• Upsilon follower
• Chi lead-in
• Letter before Beta in a society's name
• -- Beta Kappa
• Dr. ___
• Letter after upsilon
• Fraternity letter, perhaps
• 14th after 40-Down
• Fraternity character
• Letter on a key
• Pa. team, on scoreboards
• __ Beta Kappa