Related Clues:

• An Amerind
• Like an otological test
• Certain Sioux speaker
• Ear-relevant prefix
• Prefix (to do with hearing)
• About ears
• Language akin to Iowa
• Plains folk
• First tribe encountered by Lewis and Clark
• Not visual
• About the ear
• People met by Lewis and Clark
• By ear
• Prefix before scope
• Concerning the ears