Related Clues:

• Post accepted by high flyer
• Packet on packet? Not if it's this
• Post in which a musical bloke may be heard?
• Post via plane
• Way for sending out message sounding like 'Next monarch a king'
• Port's place organised for goods transport system
• High-flown writings
• Male heir pronounced out of order for some post
• Trouble behind goal with header finally going in -- it flies in!
• Display armour in overseas post?
• Excellent marines upset getting post in the sky?
• Letters sent by plane
• Letter delivery system
• Shipping option
• Post needing services of a high-flyer