Filed from 3 published puzzles

ACUITY

Set to 3 different clues across 3 published puzzles, most often “Sharpness” — The New York Times, Thursday, 26 August 2010.

6 letters

Every clue on record, most used first

Sharpnessonce
The New York Times — Thursday, 26 August 2010
Keen perceptiononce
The New York Times — Sunday, 2 March 2003
Sharp-sightednessonce
The New York Times — Friday, 5 July 2002

Other answers to these clues

ACUMEN6 letters
EAR3 letters
EDGE4 letters