IOWA

Set to 51 different clues across 60 published puzzles, most often “Part of the Corn Belt” — The New York Times, Tuesday, 30 September 2003.

4 letters

Every clue on record, most used first

Part of the Corn Belt4 times
The New York Times — Tuesday, 30 September 2003
Corn Belt state3 times
The New York Times — Wednesday, 29 August 2007
Hawkeye's home2 times
The New York Times — Wednesday, 19 March 2008
"Field of Dreams" setting2 times
The New York Times — Sunday, 14 January 2001
The Hawkeye State2 times
The New York Times — Monday, 24 April 2000
Hawkeye State2 times
The New York Times — Monday, 25 May 1998
Herbert Hoover's home stateonce
The New York Times — Wednesday, 8 June 2011
Home of Fort Dodgeonce
The New York Times — Wednesday, 4 May 2011
Where I-80 crosses I-35once
The New York Times — Friday, 29 April 2011
Early caucus stateonce
The New York Times — Wednesday, 30 June 2010
Big Ten teamonce
The New York Times — Thursday, 10 June 2010
Where James T. Kirk was born and raisedonce
The New York Times — Wednesday, 3 February 2010