CODED

Set to 7 different clues across 7 published puzzles, most often “In secret language” — The New York Times, Monday, 23 April 2007.

5 letters

Every clue on record, most used first

In secret languageonce
The New York Times — Monday, 23 April 2007
Requiring cracking, perhapsonce
The New York Times — Friday, 7 January 2005
Like something written in 21-Acrossonce
The New York Times — Sunday, 7 October 2001
Like DNAonce
The New York Times — Sunday, 9 September 2001
Having secret marks, maybeonce
The New York Times — Tuesday, 26 June 2001
Like many wartime messagesonce
The New York Times — Sunday, 19 December 1999
Unreadableonce
The New York Times — Saturday, 4 July 1998