Lyrists

5 clues
Erato and others
Old harp players
Greek harp players of old
Orpheus and others, musically
Apollo, Hermes and Terpsichore
Similar answers:
Abraceofdentists
Absolutelyright
Abstractionists
Activists
Actualists
Acupuncturists
Aerialists
Ageists
Agists
Agonists
Alarmists
Alchemists
Alienists
Alists
Alldentiststhey
Allergists
Alpinists
Altoists
Altruists
Amorists