The term 'Western Group' can be summarized by the crossword solution 'POSSE, ' which is a five-letter word. A POSSE is a group of people, usually in the American West, who are organized to enforce the law or to search for a criminal or fugitive. The term is derived from the Spanish word 'POSADA, ' meaning 'INN' or 'SHELTER.' POSSE members are typically volunteers who are deputized by a sheriff or other law enforcement official.