The Collaborative International Dictionary of English v.0.48:

Click \Click\ (kl[i^]k), v. i. [imp. & p. p. Clicked
   (kl[i^]kt); p. pr. & vb. n. Clicking.] [Prob. an
   onomatopoetic word: cf. OF. cliquier. See Clack, and cf.
   Clink, Clique.]
   To make a slight, sharp noise (or a succession of such
   noises), as by gentle striking; to tick.
   [1913 Webster]

         The varnished clock that clicked behind the door.
                                                  --Goldsmith.
   [1913 Webster]