I am off for my FIAT club meet will be back in the afternoon only, shall post some snaps of the meet tomorrow.
ACROSS
1 - Circle newspaper article revealing chief troublemaker in group (10) – {RING}{LEADER}
6 - A cat, ounce (4) – {A}{TOM}
9 - Very bad, the French records (10) – {CHRONIC}{LES}
10 - Artist's line after nothing said (4) – {O}{RA}{L}
12 - Swindle German woman and daughter (5) – {FRAU}{D}
13 - One in bar ordered drop of rum - that's something requiring little thought (2-7) – {NO-BRAINE*}{R}
15 - Besides displaying bravado, one is struggling against second in league (4,3,5) – {OVER AND ABO*}{V}{E}
18 - It's nothing to get in? Not right, there's this charge (9,3) – ADMISSION F
21 - Spy on the awfully small witch (9) – {PYTHONES*}{S}
22 - Had on about son being poorer (5) – {WOR{S}E}
23 - Toy boy losing head twice, flipping (2-2) – YO
24 - Dora lit me a fresh cigarette (6-4) – TAILOR-MADE*
26 - Sounds like legal documents for top hotel (4) – RITZ(~writs)
27 - Player against international, an opener for Trinidad (10) – {CON}{TEST}{AN}{T}
DOWN
1 - Fierce criminal in Brazilian port (6) – RECIFE*
2 - Common girl's language, initially (6) – {NORMA}{L}
3 - Maths exercise causing lengthy disagreement (4,8) – {LONG} {DIVISION}
4 - Area in court to be renovated? On the contrary (2,9) – AU CONTRAIRE*
5 - River in Sussex, England (3) – EXE [T]
7 - In which one may see Ping, Pang and Pong go round a point (8) – {TUR{A}N}{DOT}
8 - Potential army leak? Nonsense (8) – MALARKEY*
11 - Make a short speech, or be taciturn about article (3,1,3,5) – SAY A FEW WORDS [DD]
14 - Dish - nuts left in mine (6,5) – {BANANA S}{P{L}IT}
16 - One supporting the Treasury wielding party axe? (8) – TAXPAYER*
17 - In the morning they changed stone for a purple variety of sapphire (8) – {AM}{ETHY*}{ST}
19 - A jolly girl in navy (6) – {ARM}{ADA} ARM = A Royal Marine = Jolly
20 - Leave course, disheartened (6) - DES
25 - Head of Assembly, shot in the past (3) – {A}{GO}