Answers are 1970s singers or groups
14 boys matter in hindsight (4)
25 adore with boundaries (4 9)
29 transit is real(3 5)
30 precious Stone from Michigan (7 8)
32 essential for a recipe (4 10)
34 miss Mathews from yorkshire(4 3)
38 found in quite a pretty mess (5)
Thanks for any help