Definition of clucks:
(n) :
The sound made by a hen, especially when brooding, or calling her chicks.
(n) :
Any sound similar to this.
(v) :
(intransitive) To make low clicking sounds (refers to hens).
(v) :
To call together, or call to follow, as a hen does her chickens.
(n) :
A kind of tongue click used to urge on a horse.
(n) :
(Texas) A setting hen.