Filed from 3 published puzzles

BACKLOG

Set to 3 different clues across 3 published puzzles, most often “In-basket stack” — The New York Times, Wednesday, 26 March 2003.

7 letters

Every clue on record, most used first

In-basket stackonce
The New York Times — Wednesday, 26 March 2003
What's not done yetonce
The New York Times — Friday, 8 February 2002
Inventoryonce
The New York Times — Monday, 20 March 1995

Other answers to these clues

STOCK5 letters
STORES6 letters