Late blog, but the puzzle wasn't that hard (I was just busy). Usual DA trickiness.

Across

1

Copper, maybe one who faces the music? (9)
CONDUCTOR — double def.

6

Grouse job baffled nurses on reflection (5)
FABBO — hidden (nurses) in reversal (on reflection) of jOB BAFfled

9

Hopeful to knock off early? It’s a relief (7)
ASPIRIN — ASPIRINg (hopeful) without last letter

10

(& 16-across) Shorten returns, walking on air - ultimately over-ambitious goal (1,6,3,3)
A BRIDGE TOO FAR — ABRIDGE (shorten) reversal (returns) of AFOOT (walking), R (last letter of air)

11

Waste keeper - sod that’s bowled to fulfil victory (7,3)
WHEELIE BIN — HEEL (sod) IE (that's) B (bowled) inside WIN (victory)

12

Facebook revamp made less commercial? That’s odd (4)
META — MadE without ad (commercial) TA (odd letters of that's)

18

Drink it and you may see this way (6)
DOUBLE — cryptic def., &lit

19

Commie carrying papers as needed (8)
REQUIRED — RED (commie) with QUIRE (papers) inside

22

Reports supported Danish physicist (4)
BOHR — homophone (reports) of BORE (supported)

23

Nannies, say, I spotted among sculptors? (10)
CAREGIVERS — EG (say) I inside CARVERS (sculptors)

26

Pricier teabag? (7)
STEEPER — double def.

27

Get another instrument to reduce carbon (7)
REORDER — REcORDER (instrument) without c (carbon)

28

So gross above Canadian territory (5)
YUKON — YUK (so gross) ON (above)

29

Retired mafia cove saying boards attack! (5,4)
BOMBS AWAY — reversal (retired) of MOB (mafia), SAW (saying) inside (boards) BAY (cove)

Down

1

Travel writer arranged tea with 18-across (7)
CHATWIN- — CHA (tea) with TWIN (18-across, double)

2

Rock-sheet pile delivered (5)
NAPPE — homophone (delivered) of NAP (pile)

3

(& 14-across) Fishy teller ran loan with retailer numbers, evenly crunched (10,8)
UNRELIABLE NARRATOR — anagram (crunched) of RAN LOAN RETAILER UBR (even letters of number)

4

Fruit zest up fish (8)
TANGELOS — TANG (zest) reversal (up) of SOLE (fish)

5

At heart, Iron Lady lied to Queen’s attendant? (6)
ROADIE — central letters of iROn lADy lIEd

7

Earmark funds to move foundation up in castle (6,3)
BUDGET FOR — BUDGE (to move) FORT (castle) with last letter first (foundation up)

8

Modest poker hand achieved cut in commentary (3,4)
ONE PAIR — homophone (in commentary) of WON (achieved) PARE (cut)

13

Big move, leaving borders, going northward to Bright? (10)
VOLUMINOUS — reversal (going northward) of OV (move without outside letters), LUMINOUS (bright)

15

Links area to pet brute (9)
ROUGHNECK — ROUGH (links area) NECK (to pet)

17

Lament detailed tram sealing wire (8)
TELEGRAM — ELEGy (lament without last letter) inside (sealing) TRAM

18

Claude who scored sides in debate like a coach? (7)
DEBUSSY — DE (outside letters of debate) BUSSY (like a coach)

20

Two boys in total (7)
DESTROY — DES, TROY (two boys)

21

Turn on bishop in European capital (6)
ZAGREB — ZAG (turn) RE (on) B (bishop)

24

Grant what 9-acrosses promise? (5)
ENDOW — cryptic def.

25

(& 6-down) Attack romantic setting? (4,4)
OPEN FIRE — double def.