Complex sentence: Clooney was not able to lead WKRC back to ratings leadership it enjoyed in the past, then later moved on to Salt Lake City, Utah for several years to host the newly created evening news program on the FOX affiliate KSTU.
Split into simpler sentences: Clooney was not able to lead WKRC back to ratings leadership it enjoyed in the past. He moved on to Salt Lake City, Utah for several years to host the newly created evening news program on the FOX affiliate KSTU.