UNDERLOCKANDKEY
Set to 2 different clues across 2 published puzzles, most often “Like the thief at 17- and 27-Across” — The New York Times, Friday, 18 March 2005.
15 letters
Every clue on record, most used first
- Like the thief at 17- and 27-Acrossonce
The New York Times — Friday, 18 March 2005
- Securedonce
The New York Times — Monday, 2 October 2000