GENX

Set to 4 different clues across 6 published puzzles, most often “Boomers' kids” — The New York Times, Thursday, 23 September 2010.

4 letters

Every clue on record, most used first

Boomers' kids3 times
The New York Times — Thursday, 23 September 2010
Post-baby boomer group, for shortonce
The New York Times — Wednesday, 8 December 2010
Baby boomers' kids, informallyonce
The New York Times — Monday, 19 May 2008
Demographic group, brieflyonce
The New York Times — Saturday, 16 September 2006