Related Clues:

• Daily publication where you'd read the ends of 18-, 20-, 33/35- and 52-Across
• Traditional first anniversary gift
• "You've got __"
• The pulp in pulp fiction
• Vacationer's accumulation
• Drop in a letter box
• Postal deliveries
• Letters and such
• Drop in a letterbox
• Letters, collectively
• Drop in a slot
• It's not delivered on Sundays
• Postal sackful
• Attire for Galahad
• It contains a lot of letters?