2: Ban professional writer (9)
3: Anger that is constraining response (3)
4: Arenas almost filling with the hooter (5)
6: Man, what an avant-garde US artist! (3)
7: Belgian port getting rid of an idiot (5)
9: Half disapprove of old king (3)
11: 4-down Arias hit high note in some of the lungs (3,3)