No there isn't. Fresh and Clean does not have an auto-advancing post slider. The themes that have featured posts image sliders are here http://theme.wordpress.com/themes/features/post-slider/ In most of the themes with featured post sliders, visitors have to click to advance the slider to the next featured post. Some themes have a featured post slider that automatically advances: Debut, Currents, Linen, On Demand, Modularity Lite. (the first 4 are premium themes) and the last one is a free theme. Sight is a free theme with an auto-advancing post slider.