The term 'AD HOC OATER GROUP' is a crossword solution for the word 'POSSE', which is a term used to describe a group of people who are organized to accomplish a specific task or mission. This term is often used to refer to a group of people who are organized to protect or defend someone or something, or to enforce the law. The term 'AD HOC OATER GROUP' is a combination of two words: 'ad hoc' and 'OATER'. 'Ad hoc' is a Latin phrase meaning 'for this purpose' and 'OATER' is an old-fashioned term for a western movie. Therefore, the term 'AD HOC OATER GROUP' can be interpreted as a group of people organized for a specific purpose, such as protecting or defending someone or something, or enforcing the law, in a western-style setting.