ALO

Set to 3 different clues across 3 published puzzles, most often “Santo Domingo greeting” — The New York Times, Thursday, 3 March 2011.

3 letters

Every clue on record, most used first

Santo Domingo greetingonce
The New York Times — Thursday, 3 March 2011
Havana greetingonce
The New York Times — Friday, 10 September 2010
Phone greeting in Central Americaonce
The New York Times — Thursday, 26 June 2008