FERRITE

Set to 2 different clues across 2 published puzzles, most often “Compound of iron” — The New York Times, Tuesday, 20 March 2007.

7 letters

Every clue on record, most used first

Compound of irononce
The New York Times — Tuesday, 20 March 2007
Compound in computer memory coresonce
The New York Times — Saturday, 24 July 1999