Filed from 3 published puzzles

ADENOID

Set to 3 different clues across 3 published puzzles, most often “Of the lymph glands” — The New York Times, Sunday, 21 December 2003.

7 letters

Every clue on record, most used first

Of the lymph glandsonce
The New York Times — Sunday, 21 December 2003
Throat tissueonce
The New York Times — Monday, 15 July 2002
It's above the tonsilonce
The New York Times — Sunday, 26 December 1999