I think the phrase bring on = have them come in .
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Perfect StrangerCorrect me if I'm wrong but I'm quite certain that if we skip on the meaning will remain pretty much the same...The meanings are not radically different, but they are different. A native speaker would not say "bring the clowns" when he means "bring on the clowns."
eipjooThough ‘bring’ is a transitive verb, why does it followed by adverb on?These are phrasal verbs. "on" is part of the verb.