The term 'Rookie Socialite' can be broken down into two words: Rookie and Socialite. A rookie is a person who is new to a particular job or activity, while a socialite is someone who is well-connected in the social world and is often seen at high-profile events. The crossword solution for this term is DEB, which stands for debutante. A debutante is a young woman who is presented to society at a formal ball or other event.