Final answer:
To remove ambiguity from the sentence, the pronoun 'him' should be replaced with the specific name of the clown being referred to, either 'Packy' or 'Korny', depending on who felt ridiculous.
Step-by-step explanation:
To reduce the ambiguity in the sentence "Packy the Clown admitted to Korny the Clown that the pie-in-the-face routine made him look ridiculous," we need to replace the pronoun him with the specific name of the person who felt ridiculous. The revised sentence could be either "Packy the Clown admitted to Korny the Clown that the pie-in-the-face routine made Packy look ridiculous," if Packy is the one who felt ridiculous, or "Packy the Clown admitted to Korny the Clown that the pie-in-the-face routine made Korny look ridiculous," if it was Korny who felt that way. This replacement clarifies who was made to look ridiculous by the routine.