No 13318, Thursday 05 Aug 2021, Incognito

 Solution to 10A has been deliberately left unsolved and is to be answered only by a non-regular / novice commenter, with proper annotation. Those who have answered earlier in the week, please give others a chance.

ACROSS

7   Abundant among ostriches (4) RICH [T]

8   Walk in ship’s uniform, having sex appeal, displaying astronaut’s dress (9) SPACESUIT {S{PACE}S}{U}{IT}

10 Sleep with person after son goes away to get processed fish (6) ?I?P?R (Addendum - KIPPER {KIP}{PERson) - See comments)

11 Deficiency during boxing match leads to loss of consciousness (8) BLACKOUT {B{LACK}OUT}

12 Counting stone, perhaps, for differentiation and integration (8) CALCULUS [DD]

14/21 In capital, king is with girl having right tool (6,6) MONKEY WRENCH {MON{K}EY}{W{R}ENCH}

16 He believed that earth was at the centre of the universe! Let my Petty Officer work it out! (7) PTOLEMY {LET+MY+PO}*

18 Even numbers do not display this peculiarity (7) ODDNESS [CD]

21 See 14

23 I love mixed grease used in Mediterranean cooking (5,3) OLIVE OIL {I+LOVE}*{OIL} Semi&lit

25 Sneeze and you will get this benediction (5,3) BLESS YOU [GK]

27 Pretty young thing, honey, is a snake (6) PYTHON {PYT}{HON}

29 I can grind powder for eatery on wheels (6,3) DINING CAR*

30 Cut the devil (4) NICK [DD]

DOWN

1   Alert six girls in Los Angeles netball team at first (8) VIGILANT {VI}{Gi..s}{In}{Los}{An...s}{Ne...l}{Team}

2   Microprocessor usually carried on one’s shoulder (4) CHIP [DD]

3   Last to circumambulate around god is ghostly (6) ASTRAL {AST{RA}L*}

4   Castigate in a Malayalam bastion (7) LAMBAST [T]

5   Horrible debacle includes leading motor-boat stilled by absence of wind (8) BECALMED {BECAL{Mo...t}ED*}

6   Avoid a bird, drop head suddenly and plunge into water (4) DUCK [MD]

9   Curate losing ace negotiated ceasefire (5) TRUCE CURaTE*

13 Part of alimentary canal: found near Panama canal! (5) COLON [DD]

15 No one has hundred for the time being (5) NONCE {NON{C}E}

17 Aha! Mayan propagated a form of Buddhism (8) MAHAYANA*

19 Mediterranean wind that blew in when doctor left Morocco for southern Cote d’Ivoire (8) SCIROCCO (-mo+sci}SCIROCCO

20 Leave Netherlander to bear one’s own costs (2,5) GO DUTCH {GO}{DUTCH}

22 Lured afresh and governed (5) RULED*

24 Goods brought in hidden in shrimp or turtle (6) IMPORT [T]

26 Go underwater for a washing place (4) SINK [DD]

28 There is no alternative, initially, to her (4) TINA Acrostic

Reference List

Ship = SS, Uniform = U, Sex appeal = IT, Sleep = KIP, King = K, Right = R, Petty Officer = PO, Pretty young thing = PYT, God = RA, Ace = A, Hundred = C, Doctor = MO, Southern = S, Cote d'Ivoire = CI