CHIRON

Set to 2 different clues across 2 published puzzles, most often “Mentor of myth” — The New York Times, Friday, 27 August 1999.

6 letters

Every clue on record, most used first

Mentor of mythonce
The New York Times — Friday, 27 August 1999
Wisest of the centaurs, in Greek mythonce
The New York Times — Sunday, 11 July 1999