DOUBLE

Set to 4 different clues across 4 published puzzles, most often “It can precede the first words of 17-, 28-, 35-, 47- and 61-Across” — The New York Times, Wednesday, 20 February 2008.

6 letters

Every clue on record, most used first

It can precede the first words of 17-, 28-, 35-, 47- and 61-Acrossonce
The New York Times — Wednesday, 20 February 2008
Stunt man, perhapsonce
The New York Times — Wednesday, 29 June 2005
Two-base hitonce
The New York Times — Monday, 20 December 2004
*"Toil and trouble" precederonce
The New York Times — Thursday, 1 May 1997