The term 'RAP'S BIZ ___' in a crossword puzzle can be solved with the answer 'MARKIE, ' which is a six-letter word. Markie is a nickname for the American rapper and hip hop artist, Mark Morales, who is better known by his stage name, Marky Mark. He is best known for his 1991 hit single, 'Good Vibrations, ' which was released as part of his debut album, Music for the People. Marky Mark has also had success as an actor, appearing in films such as Boogie Nights, The Other Guys, and Ted.