BLAU
Set to 2 different clues across 2 published puzzles, most often “Blue, in Bonn” — The New York Times, Wednesday, 10 June 1998.
4 letters
Every clue on record, most used first
- Blue, in Bonnonce
The New York Times — Wednesday, 10 June 1998
- Blue in Berlinonce
The New York Times — Sunday, 30 January 1994