Related Clues:

• Seventh letter
• Athenian vowel
• Plato's H
• Second letter before iota
• Airport schedule abbr.
• Alphabetic character
• Frat letter, perhaps
• Takeoff guesstimate: Abbr.
• Takeoff stat: Abbr.
• Datum for a secy.
• Hellenic H
• Airport guess: Abbr.
• H, to Greeks
•     Traveler's request: Abbr.
• JFK posting