2: Sibling rivalry's beginning - worry about it (7)
5: Child, bask by the sound (3)
6: Englishman opening a can to dine at home (3,2)
8: Brief inclination to include likely candidates (5,4)
10: Dizzy Ben is a playwright (5)
11: Short bloke quietly escaped seaweed (3)
12: ...implies it hasn't changed (5,2)