Levitt Shell concert series returns with its sophomore season...by Andria Lisle...Cowboy" Jack Clement was 5 years old in 1936, the year the Works Progress Administration allocated $11,000 to the city of Memphis to build a band shell in Overton Park. By the 1940s, the Whitehaven-born songwriter was a regular visitor at the Shell, then called the Memphis Open Air Theater. This Thursday, Clement, a Sun Studio alumnus who moved east to forge his path as a venerated producer on Nashville's Music Row, returns home to perform at the Midtown amphitheater,...">