Cluck (?), v. i. [imp. & p. p. Clucked (?); p pr. & vb. n. Clucking.] [AS. cloccian; cf. D. klokken, G. glucken, glucksen, LG. klukken, Dan. klukke; all prob. of imitative origin.] To make the noise, or utter the call, of a brooding hen. Ray.
[1913 Webster]

Cluck, n. 1. The call of a hen to her chickens.
[1913 Webster]

2. A click. See 3d Click, 2.
[1913 Webster]