REPEAT

Set to 10 different clues across 10 published puzzles, most often “End of shampoo instructions, often” — The New York Times, Sunday, 14 February 2010.

6 letters

Every clue on record, most used first

End of shampoo instructions, oftenonce
The New York Times — Sunday, 14 February 2010
Last word in shampoo instructionsonce
The New York Times — Thursday, 8 October 2009
Parrotonce
The New York Times — Tuesday, 14 August 2007
It's been seen beforeonce
The New York Times — Saturday, 1 May 2004
Echoonce
The New York Times — Sunday, 22 June 2003
Shampoo bottle instructiononce
The New York Times — Wednesday, 24 April 2002
Kind of offenderonce
The New York Times — Sunday, 24 October 1999
Meaning of two dots and a bar, in musiconce
The New York Times — Sunday, 11 October 1998
Say againonce
The New York Times — Tuesday, 19 August 1997
Iterateonce
The New York Times — Monday, 2 October 1995