2: Sibling rivalry's beginning - worry about it (7)

6: One final, huge Greek goddess (3)

7: Weird eastern lake (5)

8: Difficult newspaper or novel (4,5)

11: Lovely to have an hour inside for recess (5)

12: Top card? Excellent! (3)

13: Make money and set out to be serious (7)

1: Old physician in sheltered church (5)

2: How to get around doing business, essentially (3)

3: Open present yonder (4,5)

4: Rabbit (male) with nest of bunnies? (5)

5: Three kernels of copper-yellow grain (3)

9: Rascally repeat? (5)

10: Casts off shacks (5)

11: Former name for joint audition (3)

12: Perform part of play (3)