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ACROSS

 1 Skirt covering 90, the opposite of 5 across (7)

 5 Send a copy in snarled tape, the opposite of 1 across (6)

 8 Unbridled grief about hint of unlucky number (6)

 9 Fools pay attention to grasp source of magic number sign (4,4)

10 Former resident of Number 10 is that multitalented entertainer (8)

11 Number one toy maker follows computer devices by ear (6)

12 Mixed nuts create bits of conversation (10)

14 Number two brought about the bulk of annoyance (4)

15 Audiovisual plays for number two campaigner, once (4)

17 Number cruncher’s pager ringing—yes, in Oklahoma (10)

20 In Britain, change will when speaking for number two, for instance (6)

22 Primate’s nosh: inside of fruit (5,3)

23 Numbers steering wheels (8)

24 Inventor of number five train in pursuit of Chinese detective (6)

25 Come out of (say) a kind of sleep trance, ultimately facing west (6)

26 Shore up unsteady musician from mythology (7)

DOWN

 1 Minced pie on the tabletop? That’s an insult (7)

 2 Noblewoman welcomes ladies, initially without number (9)

 3 Number one passage from True Mix-Up Over Human Resources Allocation, Part I (7)

 4 Number three is out of whack (5)

 5 Takes on idiots, suppressing hesitation (7)

 6 Excerpt from Perec amuses writer (5)

 7 General supporting standard number (zero or one) that has been released (7)

13 Face-off captivates number one (3)

14 Disoriented native in East Asian capital (9)

16 Energy stocks ante up for The Nation (7)

17 Buy story: “Victory interrupts contest” (7)

18 Bundle up to protect nearly requisite bone (7)

19 State’s ruler, after 99 percent loss in second place (7)

21 Coming back, get to loud ovation (5)

22 Got drunk, internalizing American enthusiasm (5)

SOLUTION TO PUZZLE NO. 3315
 

ACROSS 1, 8D, 29 & 26D ALLY + OU(CANE + A)T 3 [k]LINGON + B(ERR)Y 9 O + NSLAUGHT (anag.) 10 anag. 11 S(CREW)S 12 METE + OR(I)C 14 A + U + STRA + LIA (rev.) 17 double hidden 19 “him” 20 “goal deny” 22 RE(PUB)LIC 23 DA + HLIA (anag.) 26 hidden 27 anag. 28 T(WENT + YE)IGHT

DOWN 1 A + TOM + S + MASHER 2 LA(S)ER (rev.) 3 LOA + NWORD (rev.) 4 2 defs. 5 2 defs. 6 B(ASK)ET 7 letter bank 13 pun 15 S(E + MAP)HORE (&lit.) 16 anag. 18 M(EGAV)OLT (gave anag.) 21 AB + SENT 24 anag. 25 hidden