Across:
   1. Country metal ban I always accepted (7)
   5. Chinese leader spoils mass gathering sharing philosophy (7)
   9. Cryptic clue I had with each new and old type of geometry (9)
  10,23. Troubled and sleepless city desperately voted to adopt one as acting leader (5 6)
  11,5dn. He discovered interesting form - one reflected in small part by the million - and turned it into our superb fractal scene ultimately (6 10)
  12,22. Actor dropped line while playing an older Domingo returning to Rio (8 8)
  14. Chicken displays as one leaves... cowardly leader Scomo backs out! (10)
  16. Joint monarch and maiden (4)
  18. Dust off beam (4)
  19. Lions score freely as they take control (10)
  22. see 12
  23. see 10
  26. Merc I crashed in carjacking perhaps (5)
  27. One entrant running around, one wandering (9)
  28. Tricky Lee duds fools (7)
  29,15dn. British bulldog victories to North Carolina and Ben? Cool! (7 9)
Down:
   1. Cutting tree with something mightier than sword? (7)
   2. No longer cancelled, King out for some flesh (5)
   3. Working on site is worst for hearing (8)
   4. Wise man delaying second periods of history (4)
   5. see 11 across
   6. Cycling district (6)
   7. Lack of awareness of sovereign or ancestors (9)
   8. Reverend said to reimburse spy weaving web of intrigue at labour day celebration (7)
  13. Groups of females (or one) taken by raiding parties (10)
  15. see 29 across
  17. Asinine tee neatly encapsulated age of young adults getting nothing of value in crib (8)
  18. Some of those "Duce" 28 convinced to put out (7)
  20. Bill leaving parliament dock (7)
  21. Drapes work like this? (6)
  24. Sleep-in? It's not fitting in! (5)
  25. Opinion of even wise heads overcome by evil heart (4)
Solution:
ALBANIA=MARXISM|
C=A=O=G=A=I=G=A|
EUCLIDEAN=DANNY|
R=O=S=S=D=I=O=P|
BENOIT=LEONARDO|
I===E=S=L=G=A=L|
COCKSCOMBS=KNEE|
==H=T=R=R=N=C==|
STUD=COLONISERS|
E=R=S=R=T=N===H|
DICAPRIO=DEVITO|
U=H=R=T=V=T=N=R|
CRIME=ITINERANT|
E=L=A=E=E=E=P=E|
DELUDES=WINSTON|
Name: 825 - Fractal Scene
Author: by BenDR