The crossword solution for the term 'Country Singer Crystal' is Gayle. Gayle is a reference to the American country music singer and songwriter, Crystal Gayle. She is the younger sister of the legendary country singer Loretta Lynn and is best known for her 1977 hit song 'DON't It Make My Brown Eyes Blue'. Gayle has won numerous awards throughout her career, including the Academy of Country Music's Female Vocalist of the Year in 1977 and the Country Music Association's Female Vocalist of the Year in 1978.