The term BALLET CENTER can be broken down into two crossword solutions: ELS (3 letters) and EYDIE (5 letters). ELS is an abbreviation for the French term 'elève de l'ecole de BALLET, ' which translates to 'student of the BALLET school.' EYDIE is a reference to Eydie Gorme, an American singer and actress who was known for her performances in musical theater and Broadway shows. She was also a principal dancer in the BALLET Russe de Monte Carlo. Both ELS and EYDIE are associated with the world of BALLET, making them appropriate solutions for the term BALLET CENTER.