Related Clues:

• Inbox accumulation
• Shag carpet feature
• It may be down
• Large stack
• Carpet's characteristic
• Leaf collection
• Accumulate (with "up")
• Support column
• Atomic reactor
• Unit for 14-Down
• Professional organizer's target, maybe
• Load of loot
• Small bundle, as of paper
• Feature of a dirty desk
• Quite a tidy sum