Don't Look Down by Arsinoë - Solution

The asterisked squares spell out DVORAK, which, "taking into account an audible signal network of ironic alien" ("cue" + interweaving WRY & ET = QWERTY), constitute the "keys to unlocking the code". The eight perimetrical answers are entered in the grid as a touch-typist would --not knowing that the keyboard setting had accidentally been switched from the typical QWERTY set-up to the Dvorak layout. (Hence the title"Don't Look Down" -- the classic admonition of the typing instructor.)

In explanations, asterisks (*) indicate anagrams, ellipses (...) indicate selections from clue text, quotation marks (" ") indicate homophones, and lowercase letters indicate deletions.

Across
1 OVERTAKE [RK . PYAT . ] -- double definition, with pun on OVER-TAKE
6 LAZY [NA ; F] -- Z for D in LADY
9 QUMRAN -- QU(M)RAN, &lit.
11 ALAR -- LARA, with its last character put first
12 CRANING -- ...desiGN IN ARCade..., rev.
13 ENOKI -- OINKEr*
14 XENIA -- AI + N + EX rev.
18 ON THE GO -- final letters
19 ANTECEDENCE -- ANT + tEaChEr + DEN + CE
21 WASHING-LINE -- (WHEN SAILING)*
24 GARBING -- GARBlING
28 SWANN -- "SWAN", ref. HC Andersen
29 BAHIA -- BA(HI)A
30 ANTILOG -- (NAIL GOT)*
31 JAIL -- J + A(I)L, &lit.
32 LIZARD -- rhyme for WIZARD, IZZARD
33 HARM [DAPM] -- ...FrencH ARMoire...
34 FLAGPOLE [UNAILRN . ] -- FLA(G)P + OLE, &lit.
Down
1 OJIBWA [RHXC , A] -- O + J(I + B)WA*
2 KOREAN WAR -- cryptic definition, ref. Chosen = Korea
3 PUNIC -- initial letters, &lit.
4 ARNO -- ON + RA, rev.
5 TAG END -- T(AG)END
6 NANA -- double definition, ref. Peter Pan
7 ALOPECIA -- A + POLICE* + A, ref. Oakland Athletics = A's
8 YOGISM [FRICOM] -- YOGi + ISM, &lit. plus quote from Yogi Berra
10 NEST EGGS -- (SEGMENTS, with G for M)*
15 ARCHIVAL -- ARCHrIVAL
16 AGENT NOUN -- AGENT + NOUN, &littish def., plus descriptive example
17 STARSHIP -- S(TARS)HIP
20 QUENCH [ ' G . BJD] -- tECHNiQUe*
22 IN VAIN -- "IN VEIN"
23 DELUXE [E . NGQ . ] -- EXULtED, rev.
25 TWIRL -- T W I + R,L, &lit.
26 FILM -- M + LIFe, rev., &lit.
27 ANZA -- ANZAc

For those four letters (Q W E Z) that do not encode to a fellow alphabetic character, both unshifted (' . , ;) and shifted ("< > : ) encodings are acceptable.