What is referred to by 'cathys clown'?

Based on the clue 'cathy moriarty earned an oscar nomination for her ...', what is the answer? Based on the clue 'cathy reveals that suddenly last summer cousin seb...', what is the answer? Based on the clue 'cathy rigby rosie odonnell have both played this ...', what is the answer? Based on the clue 'cathy wants to sail on one', what is the answer? Based on the clue 'cato the elders obsession with the threat offered ...', what is the answer? Based on the clue 'cato the younger great grandson of cato the elder ...', what is the answer? Based on the clue 'cato the younger was half brother of servilia moth...', what is the answer? Based on the clue 'catoctin mountain park in northern maryland is the...', what is the answer?