Amerindians from the east observed life, inhaling joint (7)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

A reversal (‘from the east’) of SAW (‘observed’) plus BIJO, an envelope (‘inhaling’) of J (marijuana ‘joint’) in BIO (biography, ‘life’). Chambers and Collins like this spelling of a people of the Great Lakes (and thereabouts) region; Wikipedia plumps for Ojibwe, Longfellow for Ojibway and there are other variations (not to mention the alternative Chippewa).