1: Wooded hillock forming part of Arthur's territory (5)
2: Prohibit couple from erotically wearing less clothing (5)
3: Capital - a Schubert composition (9)
5: Neil lost a letter and ended up with nothing (3)
9: The Irish are working for small clubs (5)
10: Some feudal assassin in Japan (5)
11: Crook skimmed cash register? (3)
12: Child, bask by the sound (3)