The term RAT ISLAND RESIDENT is solved by the crossword solution ALEUT, which is a reference to the indigenous people of the Aleutian Islands. The ALEUT are an Alaska Native people who have lived in the Aleutian Islands for thousands of years. They are known for their unique culture and language, as well as their traditional fishing and hunting practices. As Rat Island is part of the Aleutian Islands, it is likely that the term RAT ISLAND RESIDENT refers to an ALEUT person.