OSMIC

Set to 5 different clues across 6 published puzzles, most often “Of element #76” — The New York Times, Sunday, 15 November 2009.

5 letters

Every clue on record, most used first

Of element #762 times
The New York Times — Sunday, 15 November 2009
___ acid (microscopic staining compound)once
The New York Times — Friday, 10 September 2010
With 52-Down, microscopic staining compoundonce
The New York Times — Friday, 23 April 2004
Of element no. 76once
The New York Times — Wednesday, 7 May 2003
Containing element #76once
The New York Times — Saturday, 2 September 2000