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ACROSS

 1 Official notes that woman’s review courses (10)

 6 Mostly high, cold, soft mineral (4)

10 Rita is one or 28, unfortunately (5,4)

11 Material for hose that’s only coiled neatly at first (5)

12 Evangelist’s clue, using a phonetic anagram (4)

13 Suit relating to the death penalty? (9)

15 Has power with $1,000 in checks (6)

17 Betray bats (8)

20 Styles primitive dwellings, adopting air conditioning to start (8)

21 One who might be 17, or 21, or older and unacceptably nosier (6)

23 Urchin with the first answer, down in Mexico: “You are spontaneous” (9)

25 Duck, Duck, Goose, for instance! (4)

27 Accord, possibly, with sweetheart and lawyer (5)

28 10 cataclysmic days during which the world was created, according to aboriginal mythology (9)

29 Deftly conceal a tree (4)

30 In return, New York’s got the magnitude to put things together (10)
 

DOWN

 1 Carouse, as opening of formal dance postponed (4)

 2 Pasta, chopped up? Cut it fine (9)

 3 Spooky Eastern lake (5)

 4 Toss nitrogen in the sky (6)

 5 In conversation, interpreted “planting device” as a kind of tree (3,5)

 7 Commercial nearly put down Dwight’s opponent (5)

 8 Gallop slowly and hide where you’d find a 14 (10)

 9 Tom or Sam, swapping $100 for a dollar, gets loose (8)

14 Prelate is attracted to both sexes in saucy business (10)

16 Reformed cons hail saint (8)

18 Barber keeps up with seven holding leadership in Rome: Julius Caesar, Mark Antony, et al. (9)

19 In a manner that’s idiotic and irrational, with sexy, well-built exterior (8)

22 Gleaming penny beneath front half of Olympic sled (6)

24 Criticize and train a group of experts, perhaps (5)

25 Retrospective covering 2001, for example—that’s an easy one (5)

26 Wilder means of inheritance (4)
 

SOLUTION TO PUZZLE NO. 3286
 

ACROSS 1 B(RAND)ED 5 SPLI (anag.) + FF 10 FRANC + HIS + E 11 YEN + TA 12 RE MARK 13 C([d]-OLLAR-D)S 14 AX + IO + M 16 “kneels, bore” 18 anag. 20 [s]TRESS 21 N(EURO)SIS 22 RUB(B)LE 25 T + RIAL 26 SCO(PESO)UT 27 DR + ESS[a]Y 28 POUN(CE)D

DOWN 1 anag. 2 AL[l] + ARM 3 DECO RUM 4 D + RIP 6 PH + YLLIS (rev.) 7 [w]INNERS + OLE 8 “phrase” 9 MEL(ODE)ON 15 IN + TRUSIVE (anag.) 16 NOI (rev.) + SIEST[a] 17 anag. 19 N + OODLES 20 T(RUDE)AU 21 NOTE + D (rev.) 23 B(RON)C 24 SO UP