The Collaborative International Dictionary of English v.0.48:

Chanticleer \Chan"ti*cleer\ (ch[a^]n"t[i^]*kl[=e]r), n. [F.
   Chanteclair, name of the cock in the Roman du Renart (Reynard
   the Fox); chanter to chant + clair clear. See Chant, and
   Clear.]
   A cock, so called from the clearness or loudness of his voice
   in crowing.
   [1913 Webster]