I've ground to a complete halt with this after cold-solving 2/3 of the clues. In order to get going again I would appreciate help with:
9. 'Gas by-product of wheat after carbon reduction'. It looks like a by-product - c = a gas but all I can think of is chaff.
6/10. 'Protection for member of unaccomplished metal band'. Some sort of arm or leg armour?
10. 'String instrument Black Sabbath breaks - it's easy to imagine'. An instrument with bs or bar/ban+s in?
Hints or a shove in the right direction much appreciated. If that doesn't do the trick I think I'll admit defeat and try the Azed!