What does deep house, the work of Stockhausen, a self-programmed snake and a frozen Lily Cole have in common? No, it’s not the contents of a lost episode of Skins. Nor is it the XX’s Christmas list. It is, rather, just a few of the details that make up Clean Bandit, a new four-piece that in their playfulness and willingness to trample over musical boundaries offer a refreshing new direction for dance music in 2013.