Across:
   1. Stock initially up with strange rise, mostly enthusiasm for upgrades (10)
   7. Primarily Mafia, or bikies? (3)
  10. Forts pour liquid to protect from attack from water (9)
  11,13. Huge boxing line-up with return of healthy and essentially loyal champion fighter (5 2 2 4)
  12. Aichi position with rotation included in Hatha yoga now (6)
  13. see 11
  15. Within 10 tent I'm estranged frequently (10)
  16. Alternately Pittman and Buttrose (3)
  18. Use pan for Stephen perhaps (3)
  19. Big no-no: all foolishly shooting up (10)
  22. Gave up taking ecstasy after old lover went over (8)
  24. see 23 down
  26. Horse monument changed after men removed (5)
  27. Unusual fellow in belltower in sort of bad mood (9)
  28. Argentine king provides Italian singer South African saddle (3)
  29. Listen carefully: interrupted sax part joined up again (10)
Down:
   2. Messy'n'shit... ugly! (9)
   3. Evacuating in gym, pet right out of order (8)
   4. Most of those abused got fired (4)
   5. see 9
   6. Slav OK to be moved, perhaps from Bratislava? (6)
   7. Relative to speed of sound, not moving at all? Tough! (5)
   8,25. "Ingrid"? You write letters solving her problems, like brother eating strange Arab halal preparation (7 4)
   9,5. Director of Frozen fell far, ice-corrupted (6 10)
  14. Roguish makeover of epic square (10)
  16. It can help top cake or line gnocchi, without long hard mixing (5 4)
  17. They have funny lines of code, semi-assembled (8)
  18. Female winning 400 of 2000 liberated male (7)
  20,21. Sadly rued tenor sax god (USA, departed) (6 6)
  21. see 20
  23,24ac. Killer doll keen to be celebrated deadly fighter (5 6)
  25. see 8