Sentence:  There was something distinctly low-key, even wilfully alienating about the band's performance. A scattering of OK Computer tracks were interspersed with more abstract latterday material – the <WSD>clatter</WSD> of 15 Step and Myxamatosis. 
Meaning of the word marked with <WSD> tags:  A rattling noise; a repetition of abrupt, sharp sounds.