The term 'Algonquin Chief' refers to a leader of the Algonquin people, an indigenous group that lived in the northeastern United States and southeastern Canada. The crossword solution for this term is 'SAGAMORE, ' which is an Algonquin title given to a chief or leader. The title was traditionally given to a respected elder who had earned the trust of their community and was responsible for making decisions on behalf of the tribe.