The Collaborative International Dictionary of English v.0.48:

Claqueur \Cla`queur"\, n. [F.]
   One of the claque employed to applaud at a theater.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

31 Moby Thesaurus words for "claqueur":
   adherent, applauder, appreciator, attender, audience, booster,
   buff, commender, deadhead, encomiast, eulogist, eulogizer,
   extoller, fan, groundling, hired applauder, lauder, moviegoer,
   panegyrist, pass holder, playgoer, plugger, praiser, promoter,
   puffer, rooter, spectator, standee, theatergoer, tout, touter