Related Clues:

• Postmarked pieces
• Push the envelope?
• Post office delivery
• Protection provider
• It's sometimes certified
• Joust wear
• Garb for Galahad
• Breastplate, e.g.
• Jouster's covering
• Junk in the box?
• Combat covering
• Jouster's wear
• Kind of bag or box
• Hard-to-break plates
• Tilting outfit