AWACS

Set to 10 different clues across 13 published puzzles, most often “Military plane acronym” — The New York Times, Monday, 9 May 2011.

5 letters

Every clue on record, most used first

Military plane acronym3 times
The New York Times — Monday, 9 May 2011
High-tech surveillance acronym2 times
The New York Times — Wednesday, 5 January 2011
___ planeonce
The New York Times — Friday, 24 June 2011
___ plane (military craft)once
The New York Times — Monday, 3 January 2005
Eyes-in-the-skies acronymonce
The New York Times — Friday, 5 July 2002
Radar-equipped planeonce
The New York Times — Wednesday, 13 March 2002
Gulf war planesonce
The New York Times — Sunday, 26 November 2000
Sophisticated military planeonce
The New York Times — Tuesday, 21 September 1999
Modern surveillance toolonce
The New York Times — Tuesday, 30 June 1998
Radar system acronymonce
The New York Times — Friday, 4 August 1995