The term 'Waiting for Lefty Playwright' refers to Clifford Odets, an American playwright and screenwriter who wrote the 1935 play 'Waiting for Lefty'. Odets was a major figure in the American left-wing theatre of the 1930s and 1940s. He was a founding member of the Group Theatre, which was a collective of actors, directors, and playwrights who sought to create a new form of socially relevant theatre. Odets' plays often dealt with social issues such as poverty, labor struggles, and the plight of the working class.