Across:
1. In regret, go back off script (5)
4. Toil safe at sea when carrying secondary vessels (9)
9. Western Australia briefly meets heads of new industry, also known as 29 of 24 fame (7)
10. It's old, hosting 25 24 down & other 6s, origins going back 250 years since it was founded (7)
11. Strongly assert "in pain, sister!" (6)
12. Vaguer heros liaise regularly, and holy figures are often backed by them (8)
14. Jerry's usual capers? (10)
16. Employment for 29 of 24 fame (4)
19. Central precinct oriented differently in European city (4)
20. For each one travelling in SUV, I get most cranky as the person in charge (10)
22. Bamboo bear not so much, but some smaller mammals cycling during widespread affliction (8)
23. Extremists from Zambia wearing mostly khaki arrangement from central Asia (6)
26. This sort of thing is often kept discreet, tacit or even held back (7)
27. Wide bin, really big one (7)
28. Not usually, I hope, anti-African? (9)
29. Those who served returning to get drugs and a strange glow in Canada (5)
Down:
1. Enter writ, newly transcribed (9)
2. Tools to wipe dotty head in pursuit of good looks (5)
3. This comes out in online challenge? (8)
4. There's a big one between Angola & Kenya (4)
5. Worry about rub going wrong if extended session starts ... 24.25% of them go for an extra day! (10)
6. All-in gamble is an art form (6)
7. Firstly, apsidal points; here elliptic (low interference) orbiters naturally slowest (9)
8. Small joints, or "reefers" perhaps (5)
13. Unhealthy? Chew regurgitated food naked! (Current mysterious movement.) (10)
15. Maths icon developed 24 (9)
17. Ridiculous huger cars bring extra expense (9)
18. Most go through clouds, one through hills (8)
21. Variety with big numbers in Australia, and more in development (6)
22. What people want a sli​ce of, including European Commission slice (5)
24. Expensive phone requires some help paying back! (5)
25. Small pale bird (4)
Solution:
ROGUE=LIFEBOATS|
E=A=M=A=E=A=P=H|
WOZNIAK=BOLSHOI|
R=E=S=E=R=L=E=P|
INSIST=AUREOLAS|
T===I=I=A=T=I==|
TOMFOOLERY=JOBS|
E=A=N=L=I=A=N=U|
NICE=SUPERVISOR|
==I=M=M=S=I===C|
PANDEMIC=KAZAKH|
I=T=R=N=S=T=P=A|
EROTICA=WHOPPER|
C=S=N=T=A=R=L=G|
ETHIOPIAN=STEVE|
Name: 896 - Pricey Phone
Author: by BenDR

Annos-Across:
1. rev(GO) in RUE
4. B in *( TOIL SAFE )
9. W + OZ + N I A K
10. rev acr ( I(ts) O(ld) H(osting) S(wan) L(ake) O(ther) B(allets) ) <
11. tel (pa)IN SIST(er)
12. alt vAgUeR hErOs LiAiSe
14. TOM + FOOLERY (CD)
16. dd
19. (pr)ECIN(ct) <
20. PER in SUV + I SOR(e)
22. PAND(a) + cyc(MICE)
23. Z(ambi)A in *KHAK(i)
26. rt (t)ACIT OR E(ven)
27. W + HOPPER
28. *(I HOPE ANTI)
29. rev( VETS ) + E
Annos-Down:
1. *( ENTER WRIT )
2. G + A(d)ZES
3. E MISSION
4. (Ango)LA KE(nya) , ext def / semi-&lit
5. *RUB in FEAR + I E S
6. ALL in BET
7. acr &lit
8. S + HIPS
13. ILL + (r)UMINAT(e) + I
15. *( MATHS ICON )
17. *(HUGER CARS)
18. A + VIA TORS
21. *( MORE IN )
22. PI(EC)E
24. rev tel (h)ELP PA(ying) <
25. S + WAN
Defs-Across:
1. off script
4. vessels
9. 29 of 24 fame
10. 250 years since it was founded
11. Strongly assert
12. holy figures are often backed by them
14. Jerry's usual capers
16. Employment
16. 29 of 24 fame
19. European city
20. the person in charge
22. widespread affliction
23. from central Asia
26. This sort of thing is often kept discreet
27. really big one
28. African
29. a strange glow in Canada
Defs-Down:
1. transcribed
2. looks
3. This comes out
4. There's a big one
5. 24.25% of them go for an extra day
6. an art form
7. Firstly, apsidal points; here elliptic (low interference) orbiters naturally slowest
8. "reefers" perhaps
13. mysterious movement
15. 24
17. extra expense
18. Most go through clouds
21. Variety with big numbers in Australia
22. slice
24. Expensive phone
25. bird