Related Clues:

• "Junk" that goes third-class
• Lancelot's strong suit?
• 'You've got --'
• Postman on the phone
• Common delivery
• Some plane cargo
• A lot of it is first-class
• Irish boy returning to post
• Armour; post
• Letters; armour
• Sound fellow in flexible armour
• Letters man read out
• Eg, letters
• Letters, parcels
• Irishman turns up to deliver post