The two crossword solutions for the term 'BALL'S PARTNER' are ARNAZ and CHAIN. ARNAZ is a reference to Lucille Ball's real-life husband, Desi ARNAZ, who was an actor, musician, and television producer. The two were married from 1940 to 1960 and had two children together. CHAIN is a reference to Vivian Vance, who played Ethel Mertz on the show I Love Lucy, which starred Lucille Ball and Desi ARNAZ. Vance and Ball were close friends in real life and Vance was often referred to as Ball's 'television partner'.