HAIL

Set to 30 different clues across 34 published puzzles, most often “Applaud” — The New York Times, Thursday, 17 April 2008.

4 letters

Every clue on record, most used first

Applaud2 times
The New York Times — Thursday, 17 April 2008
Hearty hello2 times
The New York Times — Wednesday, 2 June 2004
Salute2 times
The New York Times — Sunday, 14 December 2003
Flag down2 times
The New York Times — Sunday, 12 October 2003
Greet loudlyonce
The New York Times — Sunday, 19 September 2010
When repeated, exuberant cryonce
The New York Times — Friday, 17 September 2010
"___ Caesar!"once
The New York Times — Monday, 14 June 2010
Precipitation that may be the size of golf ballsonce
The New York Times — Tuesday, 28 July 2009
Approve enthusiasticallyonce
The New York Times — Saturday, 14 February 2009
Precipitation that can leave dentsonce
The New York Times — Tuesday, 26 August 2008
Stones from the skyonce
The New York Times — Wednesday, 2 May 2007
Acclaimonce
The New York Times — Friday, 23 December 2005