CLICKET
n.The knocker of a door.
Click "et, n. Etym: [OF. cliquet the latch of a door. See 5th Click. ]
clickety-clack
click e ty-clack |ˌklikətē ˈklak ˌklɪkɪti ˈklæk | ▶noun a repeated clicking sound as of shoe heels on a hard surface. ▶verb [ no obj., with adverbial of direction ] move with such a sound: the train clickety-clacked along the tracks.