The hit song “Layla” by Derek and the Dominoes remains one of Eric Clapton’s crowning achievements. However, for artist Rita Coolidge, it was a reminder of the music industry’s often unfair dealings.

While Derek and the Dominos’ Layla is heralded for its electric guitar riff, its cinematic piano outro is considered by many fans to be a classic contribution to the iconic rock song in its own right.

In late 1970, singer Rita Coolidge, who had graduated from Florida State University three years earlier, was having her promotional photos taken for her upcoming, self-titled debut album on A&M ...