Complex sentence: The circus owner Owen Gillman suggests he buy the Lion, after which Fagan would be worked as an ordinary Lion by the circus lion tamer Emil Tacuchnitz, which doesn't sit well with Floyd.
Split into simpler sentences: The circus owner Owen Gillman suggests he buy the Lion. After which Fagan would be worked as an ordinary Lion by the circuses lion tamer Emil Tacuchnitz, which doesn't sit well with Floyd.