Across
5. Experience great pleasure from eating half of quiche after Northern surrender (10)
6. Ex of Aniston's is constant target on vacation (4)
8. Executed Argentine staying behind amicable façade for long (4)
9. Extreme situation with "tablet generation" puts a stop to compassion (9)
11/24. Xi's development venture in Tibet: An alive android (it moves!) (4,3,4,10)
14. Exiting R&B singer's hotel: A drug addict (4)
15. Extravagant Tory welcomes right-winger that's boisterous in the UK (5)
16. Exiled writer ignoring onset of serious disease (4)
17. Xichang-launched orbiter is tracking celebrity's legal acts sometimes associated with marriage (4,7)
19. Excitable and generous old drunk (9)
21. Extemporaneously perform, in Basie's style, all but intro (4)
23. X-wing pilot's uncle is in the red, accordin' to hearsay (4)
24. (See 11 across)
Down
1. Extra huge rock rolled on top of Achilles (4)
2. X-ray visionary and Wisconsin writer Hubbard assume command post, accompanied by Turkey's #1 general (7,7)
3. Xmas predecessor you'll see regularly (4)
4. Xerxes' unimpressive victory: Composing earthly poem (11)
6. Exercising, old ugly patient gets to profess innocence (5,3,6)
7. Excess skin removal for guy in Sherwood (4)
10. Experiencing attraction regardless of gender, Caligula perhaps pursues Paulina, at first in playful behaviour (11)
11. Executive in fashion house (4)
12. .XLS's sister format contains headers for rows and indicators for order of columns (5)
13. "X", for Musk, is suddenly not all that? (4)
18. Extract picture (4)
20. Extraterrestrial visits quiet man whose brother was murdered (4)
22. Expend five euros to support soldier (4)