The term 'act as go-between' can be summarized by the word 'MEDIATE, ' which is a seven-letter word. Mediation is a process in which a third party helps two or more parties come to an agreement. This third party, known as a mediator, does not take sides and instead works to facilitate communication between the parties in order to reach a mutually beneficial outcome. Mediation is often used in legal disputes, but it can also be used in other contexts such as business negotiations or family disputes.