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ACROSS
 1 Laugh and dance around with old-time movie star (7,8)
 9 Try to acquire information about “large and chubby” (5)
10 Disgusted when eating a bit of seafood (like ghoti, perhaps) (9)
11 Nordic antelope uncovered mice on either side (9)
12 Heard storyteller’s instrument…(4)
14 …if playing, vocal involves a musical note (8)
16 Some poisoned gelato gets you nervous (2,4)
18 Cretan wobbling in a hypnotic state (6)
20 Bring to light medical precaution including uranium (5,3)
23 Watched and listened to behavior likely to attract attention (4)
24 Cass Elliott, e.g., invested in doctor’s old school (4,5)
27 Dental professional—yes!—wearing tattered nighties (9)
28 Noodles, right? You said it! (5)
29 All you really need to hear Mr. MacGregor’s child evaluate a kid (4,11)
DOWN
 1 Weinberger tears up about army member in women’s clothing (5,5)
 2 Entertain morning application (5)
 3 Dilapidated mill taking lead with a personal care item (3,4)
 4 Harsh-sounding Shiva initially appearing with spear (8)
 5 Pacino’s hole in one French region (6)
 6 Linger suspiciously to conceal origin of malicious sprite (7)
 7 Boost oil by cloaking shadowy vehicle for Rush Limbaugh (4,5)
 8 Exposed shifting dune (4)
13 Fruit of fragile transience (10)
15 Hyena, e.g., is small coyote’s principal nemesis (9)
17 Changing climates for climber (8)
19 It might contain water or fire, youngster (7)
21 Warrior betrayed US airman, but not Navy (7)
22 Lunatic raised Cain south of Massachusetts (6)
25 Rates, on the rise, converged on an irrational number (5)
26 I see a trace of beluga whale’s pursuer (4)
SOLUTION TO PUZZLE NO. 3264
ACROSS 1 anag. 9 D + RAKE 10 STEPSON + I.T. 11 AC(TLIK)E (kilt rev.) 12 NEEDLES[s] 13 ORCHES + TR[i]AL (chores anag.) 15 “links” 18 TAP + E 20 EX-PE[r]DITION 23 CHAR + ADE 24 S(PEED)UP 25 PROSE + CUT + E 26 AL + AMO[k] 27 anag. 
DOWN 1 anag. 2 anag. 3 anag. 4 IS + SUE 5 G + REENGAGE 6 hidden 7 TON + ALLY 8 “youths” 14 anag. 16 XENOPHOB + E (phone box anag.) 17 LIT + ERA + TI (rev.) 19 PEASO + UP (a pose anag.) 21 IN + DIANA 22 CAME(T)O 23 COPS[e] 24 2 defs.