Complex sentence: Smith then played drums and sang for the Japanese rock trio, Speed, Glue & Shinki, an interest in amphetamines being the attribution for his "Speed" monicker in the name of the band.
Split into simpler sentences: Smith then played drums and sang for the Japanese rock trio, Speed, Glue & Shinki. An interest in amphetamines was the attribution for his "Speed" monicker in the name of the band.