1) British slang for false teeth 
Clackers (also known as Ker-Bangers and numerous other names) are a toy popular in the late 1960s and early 1970s. They consisted of two plastic spheres suspended on string which, when swung up and down, banged against each other, making a clacking sound. Clackers are similar in appearance to bolas, the Argentinian weapons. They are formed out of ...
Clackers is British slang for false teeth.
any of various percussion toys consisting of balls or blocks joined by a cord.