Last three
1d Force a return for sickly champ (4)
???W
4d Chronicles chief priest with a woman after only half the witnesses appear (8)
???O?A?A
5a They are placed opposite against the work of Schubert in the poet school (9)
???A?O???
Just to confirm there is no apostrophe in Chronicles in the original clue The clue as quoted in the thread is exactly as given in the magazine. As stated I am very grateful to all those who worked hard to provide an excellent answer.