Osages

12 clues
Oranges
U.S. Indians
Plains tribe
Plains Indians
Some Oklahomans
Western Indians
Midwest Indians
Siouan speakers
Midwestern Indians
Fox Wars combatants
Some Native Americans
Native Americans of Oklahoma
Similar answers:
Aaltosaxes
Aaverages
Abridges
Acamouflagesuit
Acceptaproposal
Acebandages
Acidindigestion
Acreages
Acutebandages
Adages
Adagiosamigos
Adiosamigo
Adiosamigos
Adiosamoebas
Adjudges
Adpages
Advantages
Ages
Agesa
Agesago