Times Jumbo 1229

There was one answer (57ac) that I hadn't come across before - otherwise I thought this was fairly straightforward.

Hope to see some of you at, or after, the Times Championship in London next Saturday!

As always, * indicates an anagram.

Across
1	BACKSLASH - BACKS LASH
6	HOLY ORDERS - HOLY (sounds like 'wholly') + ORDERS
12	MINIMAL - M + I + aNIMAL
13	ALABASTER - ASTER, after A LB around A
14	VENUS - double indication ('our Neighbour' indicating a planet near Earth)
16	LAY IT ON THICK - LAY + I TON + THICK
17	ZABAGLIONE - (along baize)*
19	COCKTAIL LOUNGE - COCK TAIL, + LUNGE around O
22	BINAURAL - BIN A URAL
24	TRUMAN - sounds like 'true man'
25	AMATEURISH - A MATE, + IRISH with U replacing the initial I
26	CABER - hidden in baREBACk (reversed)
29	DOTE - DO + TE (indicated by 'notes', in the musical sense)
30	PURE-BRED - PURRED, around E + B
32	DIVERSIFY - D + I VERSIFY
34	PRESENTER - RESENTER after P
35	CHILEANS - C + LEANS, around HI
36	FAST - double definition
39	RISER - cryptic indication
40	PROPAGANDA - sounds like 'proper gander'
42	GOANNA - ANNA ('girl that reflects', i.e. a palindromic name) after GO
44	SINISTER - (retsina + is), revefersed
46	I'M ALL RIGHT JACK - double indication
48	LANCASHIRE - A + N + CASH, in LIRE
49	SOLOMON'S SEAL - SOLO, + SEAL after MONS
53	TOTEM - M after TOTE
54	INTERSECT - TERSE, in IN + CT
55	BRINGER - Bag + RINGER
56	SPOTTED DOG - SPOTTED + DOG
57	SALLY PORT - (lots r play). The clue indicates that this is a two-word answer; both Chambers and the Oxford English Dictionary give it as a single word (sallyport), although Wikipedia and other online reference sources go for the two-word version

Down
1	BONNY - BONN + Y
2	COME TO THAT - COMET, + OTT around (H + A)
3	SOLENOID - (LINO DOES)
4	ABASH - A BAS + H
5	HEADCOUNT - HEAD COUNT
6	HEAT - HEArT
7	LETHAL - LEiTH + A + L
8	OUR MAN IN HAVANA - OUR MAN IN A VAN, + A, around H
9	DEVIL-MAY-CARE - EVIL M, in DAYCARE
10	RANCOUR - RAN + COURage
11	IMPLICATED - IMPLIED around TOM
15	STEEL GREY - (geyser let)*
18	AGNUS DEI - (g idea)* around NUS
20	COUNTLESS - COUNTESS around L
21	LUMBER ROOM - LOOM, around UMBER + chaiR
23	MIND-READER - MIN (half of 'minute', indicated by 'thiry seconds') + DREADER
27	BRITANNIA - triple indication
28	MULTIPLE-CHOICE - cryptic indication
31	RECLAIMS - EC + LA, in RIMS
33	NEAR AS DAMMIT - (mainstream ad)*
34	PORT SALUT - PORT, + U in SALT
37	TO A SKYLARK - ASK, in TOY + LARK
38	FORTISSIMO - FOR, + (o + miss + it) reversed
41	ALL COMERS - (more calls)*
43	A GOOD BUY - sounds like 'a goodbye'
45	NONSTOP - NONeS + T + OP
47	X-RATED - X + RATED
50	OCTAL - hidden in 'ConcOCT A Lie'. 'based on...' refers to the answer to the next clue (51dn), EIGHT
51	EIGHT - wEIGHT
52	DRAG - Gard, reversed