9. Associated with Keats and Byron (7)
15. Really good (10,8)
29. Digit follows pets back along with your lad (7,3,3)
50. I'm washing my hair (3,5,3)
13. And they all lived.....without forty nine (5,4,5)
Don't know if the question 13 refers to q49.
49. Sounds like this comes after your boy has thrown two stones, answered as Third rock from the sun.