Solution to 13A has been deliberately left unsolved and is to be answered only by a non-regular / novice commenter, with proper annotation. Those who have answered earlier in the week, please give others a chance.
Open for anyone to solve, if not solved by 1 PM.
Seems to be a 'CROSS' day today
ACROSS
9 Occupation means an Engineer in Gen X! (8) ANNEXING {AN}{IN+GEN+X}*
10 Racy naked image (3) PIC sPICy
11 Some of that axial muscle disorder (6) ATAXIA [T]
13 Kind of plant with only one main branch, later replaced by a side from one side only (8) ?N?A?I?L ()
15 Close quarters, almost close to a group of nine (6) ENNEAD {EN{NEAr}D}
17 X is following a Y, for example (4) AXIS {X}{IS}<=>{A}
18 Best and more works for reformist (5) FIRST {FIRST+MORE}*=REFORMIST [CA]
19 One going after exact type of public transportation (4) TAXI {1}<=>{TAX}
24 '6 Down Pix' producing and putting on some gripping stuff! (8) EPOXYING {OXYGEN+PIX}* An extra X in the fodder
26 Principles of alliance incorporating a basic mantra (6) AXIOMS {AXI{OM}S}
28 Rent some stripteasers (3) RIP [T]
29 Top conservative quietly replaced to shield one thrown out (8) EXPELLEE {EX(-c+p)PEL}{LEE}
30 Bull looks at sunflower-like plants (6) OXEYES {OX}{EYES}
DOWN
1 One of the canonical hours to send lewd message on phone (4) SEXT [DD}
4 Single rate for what graduate wants (9,6) BACHELORS DEGREE {BACHELORS}{DEGREE}
5 One following, guarding every amateur (8) INEXPERT {1}{NEX{PER}T}
6 1/3rd of water's gone, wasted, tapped by earlier two generations (6) OXYGEN {GONE}* over {XY}
7 Presently unknown (4) ANON [DD]
14 Mostly following American link (5) NEXUS {NEXt}{US}
16 Growth hormone from faux indigos (5) AUXIN [T]
19 Words and wiles, women's unleashing materials (8) TEXTILES {TEXT}{wILES}
23 It is used to serve drink to a pet stray (6) TEAPOT*
27 Men having independent bearing (4) MIEN {M{I}EN}
Reference List
Into = X, Match = GO, Conservative = C, Quietly = P, Shield = LEE, Women = W, By = X, Vote = X, Female = F, Power = P