Trouper

3 clues
Thespian
Veteran actor
Reliable sort
Similar answers:
Abedandtroy
Accostcontrols
Actlikeatrouper
Adaptivecontrol
Adisserctroilus
Admissioncontrol
Adoredsuperstar
Agathatroy
Agentroomheader
Aheapofhotrodders
Albatross
Albatrosses
Allofourpatrons
Allotrope
Allyourtroubles
Altro
Altrock
Ambidetrous
Ambidextrous
Ambidextrously