Rockette launchers are a type of dance move that involves launching oneself into the air with the help of one's LEGS. It is a popular move among dancers, especially in jazz and hip-hop styles. The term 'Rockette launchers' comes from the fact that the move resembles a rocket taking off. The crossword solution for the term 'Rockette launchers' is 'LEGS', as the move requires the use of the dancer's LEGS to propel themselves into the air.