When Cream broke up in 1968 it was by no means a foregone conclusion that it would be Eric Clapton who would enjoy continued commercial success. After all, it was Jack Bruce who had the looks, and who co-wrote and sang all the band's major hits, including 'Sunshine Of Your Love', 'I Feel Free' and 'White Room'. But he was a singular talent who wanted to be a pioneer, not just a pop star, and he was never happy resting on his reputation. Bruce's...