[F. claque a smack or clap of the hand; a band of claqueurs; f. claquer to clap.] An organized body of hired applauders in a theater; hence transf. a body of subservient followers always ready to applaud their leader.

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1864.  Realm, 6 April, 5. The claque was ready with its obsequious applause of the true British Minister, who sticks to his friends.

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1870.  Brewer, Dict. Phrase & Fable (ed. 3), s.v. Claque, M. Sauton, in 1820 … was the first to organize the Parisian claque.

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