Possible Clues:

• Poetic Indian greeting what's revised in articles
• Longfellow's legendary native American chief
• Greeting a guard, not caught by a brave hero
• Longfellow's Indian
• By the sound of it, not so low over a thaw for a long, fellow-Indian
• Indian greeting answer with extremely arrogant word of contempt
• Hero of narrative poem by Longfellow
• Ojibwa in a Longfellow poem
• Minnehaha's man
• This creation of 1 across starts, by the sound of it, to be more than 1 across