Amid growing curatorial and market interest, the 92-year-old abstract painter is getting a solo show at Mnuchin Gallery. “Ed Clark: A Survey,” which opens in New York on September 14, features 40 paintings and works on paper from 1962 to 2013. The artist David Hammons, who also works with the gallery and is an avid Clark collector, was the “catalyst” for the survey, says Mnuchin’s Sukanya Rajaratnam.