PSALTERY makes another appearance in the crossword-verse this week, it's funny how that happens. Pretty fun all around.

Across

1

Monickers have misspelt main necks (9)
NICKNAMES — anagram (misspelt) of MAIN NECKS

6

No. 1 Douglas Street (5)
FIRST — FIR (douglas) ST (street)

9

Split second drink of milk (5)
SHAKE — double def.

10

Randy, Col and Sue raved about her (9)
LECHEROUS — anagram (raved) of COL SUE around HER

11

Churn out corn and rewrite by instalments (2,6)
ON CREDIT — anagram (churn out) of CORN, EDIT (rewrite)

12

Cook books at the front and rear (6)
BRAISE — B (first letter of books) RAISE (rear)

14

Sporting rock in dog fish's shade (7,5)
CURLING STONE — CUR (dog) LING'S (fish's) TONE (shade)

18

Grandfathers' dreidel shot up the hit parade (3,2,3,4)
TOP OF THE POPS — cryptic def.

21

Three times as hot in second (6)
THRICE — TRICE (second) containing H (hot)

22

Put up internet address, including answer concerning one's stance (8)
POSTURAL — POST (put up) URL (internet address) containing A (answer)

25

Determined female British leader and Labour PM welcomed a vote (6-3)
BATTLE-AXE — B (first letter of British) ATTLEE (Labour PM) containing A X (vote)

26

College issues revealing return on investment (5)
SIEGE — reversal (return) of hidden in collEGE ISsues

27

Odds that aren't at all odds in the end (5)
EVENS — cryptic def.

28

Taylor sent packing after month in city office (9)
MAYORALTY — MAY (month) anagram (sent packing) of TAYLOR

Down

1

Pretty handy with square shoulders? (2,6)
NO SLOUCH — cryptic def.

2

Opening lines in court (8)
CHANCERY — CHANCE (opening) RY (lines)

3

Kinswoman of Bonnie's other half Charlie was gutted (5)
NIECE — NIE (half of Bonnie) CE (Charlie without middle letters)

4

Spooner's showering castle mound from the crucible (7,3)
MELTING POT — Spoonerism of PELTING (showering) MOTTE (castle mound)

5

Lay waste to the elbow (4)
SACK — double def.

6

Fear green scrambled eggs, if they're ethical (4-5)
FREE-RANGE — anagram (scrambled) of FEAR GREEN

7

Tenderfoot that is underfoot of castle (6)
ROOKIE — ROOK (castle) IE (that is)

8

Smacks as class took their seats up (6)
TASTES — reversal (up) of SET (class) SAT (took their seats)

13

London's Victoria, say, and the last Queen Mary's end paper, say (10)
STATIONERY — STATION (London's Victoria, say) ER (last queen) Y (last letter of Mary)

15

So integral to shaping iceless shape (9)
ISOSCELES — anagram (shaping) of ICELESS containing SO

16

Ringer stuffed robe inside puppet (8)
DOORBELL — DOLL (puppet) containing anagram (stuffed) of ROBE

17

Let spray out of antique instrument (8)
PSALTERY — anagram (out) of LET SPRAY

19

Firm with dollars on board (6)
STABLE — S (dollars) TABLE (board)

20

Twist and turn right into white trash (6)
WRITHE — anagram (trash) of WHITE containing R (right)

23

Stare rudely at stunner (5)
TASER — anagram (rudely) of STARE

24

Hand-crafted lamp (4)
PALM — anagram (crafted) of LAMP