5  Special desserts and flavourings (6)

 9  Delay in trade union support and guidance (8)

10 Fermat’s last problem is absorbing stuff (6)

12 They took care of Caligula etc using a drug preparation quietly dropped in a cocktail (10,5)

13 DiMaggio periodically visited a villain (4)

14 Son, visiting large Spanish island, left note – a series of them  (5,5)

17 Clown reluctant to talk about some teachers in stall (7,3)

18 Festival presenting Trotsky retrospective? (4)

20 Debauched hedonist hugs Peter during gathering? Take precautions (2,2,3,4,4)

23 Rotter defaced toy (6)

24 Hello! Aussie bounder has caught blasted emperor (8)

25 See the money in Dubai that’s shelled out for institute (6)

26 My itch to gain attention met with a premature end (6,2)

 1  A competition to eat tons and behave badly (3,2)

 2  Sluggish service at Charing Cross? That’s not new (9)

 3  Keep Lady Day for indulging in passionate love (4,2)

 4  He sings Ravel retrogradely (5,7)

 6  Puritanical nonsense written about English actress (8)

 7  Damage a rib (5)

 8  Veronica's fit to join expedition (9)

11 Sharia police disrupted work in parish (12)

13 Copper in endless debate gets heated? Just so (9)

15 Native undressed for doctor, at home in Lincoln? (9)

16 Rock anthem in Carmen? It’s an abomination (8)

19 A roundabout way from Belgrade to Uruguay (6)

21 Proprietor with unique houses – and highest in rent (5)

22 Call up mainly just to check agreement (5)