Agists

4 clues
Anti-seniors people
Certain discriminators
Certain discriminators (var.)
They might say "Out with the old!
Similar answers:
Abcdaytimehosts
Abraceofdentists
Abstractionists
Accosts
Acidtests
Activeinterests
Activists
Actualists
Acupuncturists
Adagietto
Adagio
Adagios
Adagiosamigos
Adjusts
Adjuststhemir
Aerialists
Affixedcosts
Ageists
Agi
Agiant