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ACROSS

 1 A dentist, perhaps evil with a tool (5)

 4 Something related to a gasket that is useful for keeping water out (8)

 8 How mother gets around a cosmetic (7)

 9 Wacko cut nail carelessly (7)

11 Sooner or later, boy chases after perverse LA hook (9)

12 Beer fit for a queen from the Orient (5)

13 Sour dessert for licentious woman (4)

14 Cutting-edge audio-visual worker gets bad grade (5,5)

17 Fruit produced by Chuck’s dad? (10)

19 Harsh interrogation yields “It’s a hidden-word clue” (4)

22 Admit opposites, omitting start of dialogue (3,2)

23 Vishnu the maître d’? (9)

24 “Ugly stick hits you in the face”—that’s in poor taste (7)

25 Malfunctioning drain supported by firedog (7)

26 “Indeed!” Carl stupidly announced (8)

27 Tears up tiny addition to a letter (5)  

DOWN

 1 Dwayne Johnson’s head is a world landmark (4,2,3,4)

 2 Inaccessible and out-of-order urinals (7)

 3 Look at this man and feel hatred (6)

 4 Film that’s not suitable for all ages—Bambi, for example? (4,5)

 5 Director in bifocal lenses (5)

 6 The study of Chinese semiotics, we hear? (8)

 7 After teeing off, par ultimately could be 4 (7)

10 Bugs and fish: the ones competing to devour everything at first (9,4)

15 Nanny has all the ingredients for midsummer madness (9)

16 I left, traveling north—most of visit’s hot and humid (8)

18 Small part of a kitchen diet: ten bananas (7)

20 Like “false” to “true,”
Or like this clue (7)

21 What a cat might say about commercial field (6)

23 Performer forgetting introduction to lyrics—and he foots the bill (5)  

SOLUTION TO PUZZLE NO. 3283  

ACROSS 1 EUCL(IDEA)N (uncle anag.) 6 BAR(O)N 9 A-[mm]/NN-ELID (rev.) 10 anag. 11 anag. 
14 2 defs. 15 [d]/M-ARK [m]/D-OWN 17 TO + MA + HAWK 
19 2 defs. 21 BILL + O + FRIGHTS 25 RELIEV (anag.) + E 
26 CHA + LICE 27 N + AMES 
28 SAL(LOW)ES + T 

DOWN 1 [t]EXAS + P(E)RATE 
2 anag. 3 ILLFA (anag.) + ME 
4 hidden 5 anag. 6 B + EATNIK (anag.) 7 RUIN[g] 8 palindrome 
12 PO(STCHA)ISE (chats anag.) 
13 anag. 16 D(WELL)ERS (reds anag.) 18 HE + IRESS (anag.) 20 hidden 22 FO(C)AL 23 2 defs. 24 rev.