Filed from 21 published puzzles

ENSURE

Set to 10 different clues across 21 published puzzles, most often “Guarantee” — The New York Times, Sunday, 10 July 2005.

6 letters

Every clue on record, most used first

  • Guarantee6 times

    The New York Times — Sunday, 10 July 2005

  • Make certain4 times

    The New York Times — Monday, 18 July 2011

  • Protect2 times

    The New York Times — Thursday, 30 August 2007

  • Cinch2 times

    The New York Times — Saturday, 9 December 2006

  • Nail down2 times

    The New York Times — Sunday, 24 November 1996

  • Guardonce

    The New York Times — Saturday, 12 May 2007

  • Nutrition drink brandonce

    The New York Times — Sunday, 22 April 2007

  • Check againonce

    The New York Times — Thursday, 24 November 2005

  • Co-sign, as a loanonce

    The New York Times — Thursday, 29 May 2003

  • Lock uponce

    The New York Times — Thursday, 17 March 1994

Other answers to these clues