The term 'serve as a go-between' can be summarized by the word 'LIAISE, ' which is a six-letter word. Liaising is the act of acting as an intermediary between two or more parties in order to facilitate communication and understanding. It involves providing information, advice, and support to ensure that all parties involved are on the same page. Liaising is often used in business and politics to ensure that everyone is aware of the goals and objectives of the project or negotiation.