1: Dumb moans cracked up investigator of complaints (9)

5: Belated top-and-tailing to gladden one's heart (5)

8: Crazy to clean sons in awful mess (11)

11: Right, turn right to play with robot (3)

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

14: Inciting anger in the ruler of a Utah city? (9)

17: Exhausted writer found in street (5)

18: Stan's partner is central to Follies (5)

19: Rejected, for the most part, unlikely chance to buy rubbery substance (9)

20: Bug found in examination and in a full going-over (10,3)

24: Short bloke quietly escaped seaweed (3)

25: Fast times with company cracked high-strung recruiter (6,5)

26: A sample makes sense (5)

27: Southern duo, caught in act, gave up hope (9)

1: Upset top duo; I went and confessed (5,2,2,2)

2: Rings for the groups (5)

3: Mothers copper, Mark, is male (9)

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

6: Rita Mears breaks wind near a plane (9)

7: Wander around inside territory (3)

9: Affair? Despair soon dies, in steps. (7)

10: Fiction position (3)

13: Disturbed intruder, pet disturbed. (11)

15: Old file is destroyed in valuable Arab lands (3,6)

16: Consents to accepting decline in rates of change (9)

17: Upended Sparta's rulers (7)

21: Worthless even when recycled (3)

22: Concrete well cover (5)

23: White or brown powder sounds like pink (5)

24: Implement box for young cat (3)