Really stuck on 14 down: No dressing required with this low-fat hummus? (6,3) S???N?-???
21 down: Iodine perculating halfway in gut (5) I???? could it be ileum?
Also I'm pretty sure I've got 9 across but can't work out why! Riot suppressed by repeated ultimatum? (6) ?U?U?T is it tumult?
Thanks in advance