Related Clues:

• Postman on the phone
• Mail carrier's charge
• Common delivery
• Some plane cargo
• A lot of it is first-class
• Friend admits last newsletter from church arrives via the post office
• Piece (of land); something to post
• Irish boy returning to post
• Wrapped missive
• Armour; post
• Letters; armour
• Sound fellow in flexible armour
• Package; piece of land
• Name penned by royal chap, say, in old-fashioned correspondence?
• Letters man read out