The crossword solution for the term REPRESENTING (WITH 'ON') is BEHALF, a six-letter word. The term 'representing on BEHALF of' is used to describe someone who is acting as an agent or spokesperson for another person or group. This could be in a legal context, such as when a lawyer represents a client in court, or in a more informal setting, such as when a friend speaks up for someone else in a conversation. Representing on BEHALF of is also used to describe someone who is advocating for a cause or making a case for a particular point of view.