Sentence:  The <WSD>clanger</WSD> was made out of the same material, and attached to a chain at one end. The idea was to stick the <WSD>clanger</WSD> in the opening of the triangle and start circulating, whacking the triangle on all three sides as fast as you could. 
Meaning of the word marked with <WSD> tags:  The clapper of a bell, anything that strikes a bell or other metal object to make a ringing sound.