In the blog, the definition in the clue is underlined and followed by the answer; the parsing; any comments
Across
1 Official place left out? Concentrate again (7)
REFOCUS; REF-(L)OCUS;
7 Who contrived the end of Maggie? (4)
HOWE; (who)*-(maggi)E; reference Sir Geoffrey Howe who was Brutus to Maggie’s Caesar; nice clue
10 Used to be behind a lot of fit Amerinds (9)
CHIPPEWAS; CHIPPE(r)-WAS; The Chippewa are indigenous to N America and Canada
11 Rule out regular course getting a passing mention (4)
OBIT; O(r)BIT; r=rule;
13 Spurs dispensing with Walker finally to get winning scores (6)
IPPONS; (r)IPPONS = spurs; reference transfer of Kyle Walker from Spurs to Man City; nice clue;
14 Reject a search with only one recipe that’s not kosher (6)
TEREFA; A-FER(r)ET reversed;
16 Father’s unchanged after returning (4)
ABBA; reference palindrome;
18 Lord’s close matches producing lots of runs? (6)
DASHES; (Lor)D-ASHES; reference cricket’s ashes tests;
19 Putting game out of one’s head, hide in retreat (9, two words)
CRAZY,GOLF; CRAZY-FLOG reversed;
21 Charlie’s girl working after depression is a dish (9)
COLCANNON; COL-C-ANN-ON; Charlie=C (phonetic alphabet); mashed murphy and kale;
24 Salmon before sandwiches indeed reflected Indian food (6)
PAKORA; PA(OK reversed)R-A; salmon=PAR; before=A; fried murphy in batter;
25 Advanced part of telecommunications code is a stinker (4)
ATOC; A-TOC; TOC=signaller’s code for T as in Toc H; a skunk;
27 Old governor I’m not sure is one to toe the line (6)
OBEYER; O-BEY-ER; governor=BEY;
29 Information department put out guidance for treatment and it’s free (6)
UNCAGE; (guidance – id)*;
30 Muslim community imam must back? Not entirely (4)
UMMA; hidden reversed (ts)UM-MA(mi);
31 Revised US rates including room for old teacher (9)
SURMASTER; (us rates)* surrounds RM=room;
32 Go off German poet? Easy for another poet! (4)
ETHE; (go)ETHE; Spenser’s word for “easy”;
33 Praise as before all round concerning colony of birds (7)
HERONRY; HER(ON)RY;
Down
1 Olympic city’s diplomacy is what may keep the peace (7, two words)
RIOT,ACT; RIO-TACT;
2 River flowing through German university city (4)
ELBE; this appears to be a non-cryptic clue – the Elbe flows through Dresden;
3 Rows of conifers seen around one US city (9)
FAIRBANKS; F(A)IR-BANKS; city in Alaska;
4 Boorish and surly colt ready to take offence (6)
CHUFFY; C-HUFFY; colt=C (horse racing);
5 No script circulated, party stuffed? Could be my fault (10, two words)
SPIN,DOCTOR; (no script)* surrounds DO; Lizzie Louden perhaps
6 England’s opener in shock review at Headingley? (6)
APPEAL; APP(E)AL; Headingley is a cricket ground;
7 Fruit a great deal lacking in pith (4)
HEPS; HE(a)PS; pith=core; another spelling of (rose) hips
8 Macaque lacking colour tied up miles away (8)
WANDEROO; WAN-(m)OORED reversed;
9 Links in headlands with no end of green (5)
ESSES; (n)ESSES;
12 Boycott pleased he’s excited the country (10)
BANGLADESH; BAN-GLAD-(hes)*;
15 Singer hasn’t many fans (9)
SHANTYMAN; (hasn’t many)*; fans=anagrind; solo-singer at the capstan;
17 Fruit loaf? Take dough first (8)
BREADNUT; BREAD-NUT; loaf=head=NUT;
20 Keeping oneself in order, must try cane! (7)
ENCRATY; (try cane)*;
22 Newspaper’s written about one sort of seasoning (6)
ORIGAN; OR(I)GAN;
23 Rose, head dropping is one moving slowly (6)
AMBLER; (r)AMBLER;
24 Kick pedal one put to some purpose (5)
PAUSE; P-A-USE; pedal=P (music notation);
26 Term for the stomach turning up is “belly” (4)
WAME; (th)E-MAW all reversed;
28 Wanting power, first tipped to be leader abroad? (4)
EMIR; (p)RIME reversed;
I interpreted 2dn like mohn2, FWIW.