Clay's follow-up, "A Lasting Love," made it to number 48 R&B, but he soon received the surprising news that One-Derful! was going out of business and his contract had been sold to Atlantic Records, then America's biggest soul label. Atlantic chose Clay to be the debut artist for their new subsidiary label, Cotillion Records, and his first single for the new imprint, a cover of the Sir Douglas Quintet's "She's About a Mover," rose to 47 on the R&B charts and nudged the lower reaches of the pop singles chart at 97. Clay's other releases for Cotillion didn't do as well, and after cutting "Is It Over?" with producer Willie Mitchell, he struck a deal with Hi Records, where Mitchell was a house producer. Clay's first release for Hi, 1972's "Trying to Live My Life Without You," became his biggest hit, rising to number 24 on the R&B chart; the song gained a new life in 1981, when a cover by Bob Seger rose to the pop Top Ten. The success of the single prompted the release of Clay's first album, also called Trying to Live My Life Without You, and in 1973, he released the fan favorite "If I Could Reach Out (And Help Someone)." The year 1977 saw Clay leave Hi Records for Henry Stone's Kayvette label, though he would also release a string of singles and albums through his own Echo Records (including his last chart hit, 1980's "The Only Way Is Up") and issue several albums in the '90s through the Bullseye Blues label, including Soul Man: Live in Japan, where Clay had developed a devoted following. Though Clay was best known as a soul singer, he continued to perform gospel shows on occasion, and albums like 1993's The Gospel Truth and 2007's Walk a Mile in My Shoes made it clear he had not lost touch with his spiritual roots.
Clay was inducted into the Blues Hall of Fame in 2013, and stayed busy as a live performer, playing clubs and blues festivals around the world, as well as releasing albums such as 2013's Truth Is: Putting Love Back into the Music and 2014's Soul Brothers, a collaboration with Johnny Rawls. Clay was also involved in charitable and activist causes in Chicago; he was a member of the board of People for New Direction, a nonprofit organization addressing issues on the city's West Side, and was a key figure in the transformation of the Bronzeville Regal Theater into the Harold Washington Cultural Center. A heart attack claimed Clay's life on January 8, 2016; he was 73. ~ Mark Deming, Rovi