1 A means to access the subconscious is a constitutional right (4,11)

 9 Outside, he hollers back for coat (7)

10 Arouses one ugly insect (7)

11 Gordon captured by sweeping camera shot—his performance is disappointing (5,2,3,3)

13 Communicate with cooked escargots (3,6)

15 Renaissance poet to bring donkey inside (5)

16 Portia rarely sports a headband (5)

18 For example, spider or honeybee’s head stuck in broken trapdoor (9)

21 Part of the infrastructure to call John Paul II, for instance (9,4)

24 I retain irrational resistance to change (7)

25 Hawks bicycles on the radio (7)

26 Oliver’s trash is nearby (6,5,4)

 1 Stiff, intoxicated nights after initial slugfests (10)

 2 In the end, inventive segment by colony member is tasteful (7)

 3 God recalling prince to Western city (5)

 4 Lease condominium in part, usually the lower part (7)

 5 151–100—he’s wiped the floor with, made mincemeat of, and so forth (7)

 6 Hawk and I practice, irregularly (9)

 7 I sent no Baroque chants (7)

 8 Northeast street is home for some (4)

12 Subversive, low reds, conniving in silence (10)

14 Hooker entering backwards (etc.) in Southern city (9)

17 Eccentric red coat, in a style from the 1920s (3,4)

18 Pavement brings snake to a stop (7)

19 Unsatisfactory report includes zero for soldier (7)

20 Harrow or a plow in act affecting the needy (4,3)

22 Grant termination that hurts (5)

23 Bowling equipment cut up (4)  

ACROSS 1 F + RAPPE (paper anag.)
4 S(K[e]Y)LIGHT 10 ET(IO + LATE)D 11 ZE(V)ON (zone anag.) 12 anag.
14 CHES[t]S 16 hidden 18 2 defs.
20 SA(P)ID 22 “ex-tension chord” 26 S + US + HI 27 2 defs. 28 FI(NAG)LES 29 VE(R)NAL   DOWN 1 2 defs. 2 ARIA + DNE (end rev.) 3 P + YLON (only anag.) 5 KUD(Z)U 6 anag. 7 G + OVER + NS 8 2 defs.
9 S + TALKING 13 PADDE(D C)ELL (pedalled anag.) 15 S + MOO + THING 17 anag. 19 T + REASON 21 PRO NO U.N. 23 NOOS + E (rev.) 24 hidden
25 A(S I)F