6  That's a stop! (4)

 9  Nazi pervert sits on face (10)

10 A German's excessive love (4)

13 This starts to play it after loading number? (7)

15 Small piece of luggage that's unopened - soft and neat (6)

16 Ford car that is a classy vehicle - get into it (6)

17 Full ID required to see film (12,3)

18 Book a flight (6)

20 King the other king rejected (6)

21 Sat around playing while producing classical pieces (7)

22 Cat's call as he's content (4)

25 An old lady's to cackle about odd stuff (10)

26 The German axis breaks in at least 48 hours (4)

27 Attempt to fit a new spine with ease (10)

 1  I'm going north to meet Anax regularly (4)

 2  Award for accepting old woodwind instrument (4)

 3  Half a dozen fences protect part of spike (6)

 4  Reason direction changes? (15)

 5  Cellist's leisure wear (not uniform) (6)

 7  Free-thinking alien protected by ideal mistress (10)

 8  PayPal's CEO ordered book (10)

11 Mum's red skirts I have repeatedly left to get dry (10)

12 You and I entering list you'd rearranged deliberately (10)

13 So, pump furiously to keep tyre's shape inflated (7)

14 Letters initially are / is longer (7)

19 Rather like this expert (6)

20 Film certificate (adult) and a forged certificate (for all) (6)

23 Turned up behind or with the others (2,2)

24 Joke spectacles by blind man called Charles (1-3)