Filed from 2 published puzzles

HASHMARKS

Set to 2 different clues across 2 published puzzles, most often “<em>Lines on a football field</em>” — The New York Times, Wednesday, 20 October 2010.

9 letters

Every clue on record, most used first

<em>Lines on a football field</em>once
The New York Times — Wednesday, 20 October 2010
*Corned beef stains?once
The New York Times — Sunday, 1 February 2009