2: Working on mental topic? (13)

6: Form of denial mistaken as yin/yang (9)

8: English philosopher cured pig (5)

10: 3-down said Sir, I have these! (5,4,4)

11: Child can be heard getting out of bed at dawn. (3, 2)

13: I'm entering fancy residences with contractor's quotes (9)

14: Poet or old king on crest (9)

17: Upward in Aspen (or thereabouts) (5)

19: Defusing timer incorrectly can lead to this! (13)

21: Looked over recording that included Sea Change (5)

22: Capital investment producing hard faces (9)

23: Tint bark clogs to provide foot support (8,5)

1: Some slippers and also shoes (7)

2: Grave study: code-breaking? (13)

3: Curse the watcher hiding terrible evil within. (3)

4: Show attendant a part of the bible (7)

5: Puzzle with no more significance abroad (7)

7: 4-down Arias hit high note in some of the lungs (3,3)

8: Batsmen trading one who may be a winner? (4,3)

9: Challenge the bench in retaliation. (13)

12: Norm even had a good time (7)

14: Doctor returns, secures ancient manuscripts (7)

15: Hun paid out for French prince (7)

16: We blame knitter for small woolly jumper (3-4)

18: Hail storms send a message about WWI explosion (7)

20: One final, huge Greek goddess (3)