Filed from 7 published puzzles

SOYBEAN

Set to 7 different clues across 7 published puzzles, most often “Protein-rich legume” — The New York Times, Tuesday, 7 July 2009.

7 letters

Every clue on record, most used first

Protein-rich legumeonce
The New York Times — Tuesday, 7 July 2009
Source of lecithinonce
The New York Times — Saturday, 22 September 2007
Versatile legumeonce
The New York Times — Monday, 30 August 2004
Oil sourceonce
The New York Times — Friday, 26 March 2004
Hoisin sauce ingredientonce
The New York Times — Saturday, 11 December 1999
Vegetarian stapleonce
The New York Times — Saturday, 21 November 1998
Tofu baseonce
The New York Times — Wednesday, 29 July 1998

Other answers to these clues

CANOLA6 letters
COD3 letters
CURD4 letters
FLAX4 letters
FLAXSEED8 letters
LINSEED7 letters
OLIVE5 letters
PALM4 letters
SESAME6 letters
SHALE5 letters
SOY3 letters
TOFU4 letters