Ghostdance

3 clues
Amerindian ceremony
Oct. 31 social event
Plains Indians ceremony
Similar answers:
Abidance
Abundance
Accordance
Adance
Adancer
Afterthedance
Aghost
Aghostlygalleon
Aghostofachance
Aliceghostley
Alienghostalive
Anddance
Andwedanced
Attendance
Attendancesheet
Avoidance
Balletdancer
Balletdancers
Ballroomdancers
Ballroomdances