The term 'Royal Messenger' can be broken down into two crossword solutions: HERD (4 letters) and HERALD (6 letters). A royal messenger is a person who delivers messages from a monarch or other royal figure. Historically, royal messengers were often used to deliver important news or orders to distant parts of a kingdom. The term HERD refers to the fact that royal messengers often traveled in groups for safety and efficiency. The term HERALD refers to the fact that royal messengers were often responsible for announcing the arrival of a monarch or other important figure.