The crossword solutions for the term HRH PART OF are HER (3 letters) and HIS (3 letters). HRH stands for His/Her Royal Highness, which is a title used to refer to members of a royal family. The title is used to address or refer to a royal family member, such as a monarch, prince, princess, or other member of the royal family. The title is typically used in formal situations, such as when addressing a letter or making an announcement.