13a Musical device used in bar to keep time (8) and 18d Pole owns home rated as inadequate? (3-4). The answers look like Operatic and One-star, but I can't parse them.
3d I'm surprised by report of revolting action (3)
Solution is COO but I cannot see how the 'report of revolting action' comes into it. Presumably something that sounds like 'ooc' or perhaps I'm missing something blindingly obvious!