No 9568, Thursday, 25 Jun 09, Gridman

We seem to be building up to a troublesome weekend with Mr Manna.
ACROSS
1 - Big letter without one hint of antipathy added (7) - M(-i+a}ASSIVE
5 - All the stuffing is poisonous (6) - LETHAL*
9 - Municipal gathering of four or six in hundreds (5) - C{IVI}C
10 - Nut is apt to wander over Chennai ignoring backward girl for nothing (9) - PISTA*{CH(-enna)I}{O}
11 - Homeric journey (7) - ODYSSEY [CD]
12 - Thought on opening ornate wing (7) - {O}{PINION}
13 - Two-way detective system (5) - RADAR [CD]
14 - Make clear changes in the glen (9) - ENLIGHTEN*
16 - Where pedallers may have a free run (5,4) - CYCLE PATH [CD]
19 - That man content with account recalling Old Testament prophet (5) - MI{CA<-}H<- )
21 - Small queen gets debt notices — it’s grave (7) - {S}{ER}{IOUS}
23 - Having excessive interest in oneself, hurried back with cold credo (7) - {NAR<-}{C}{ISM}
24 - Not broadcasting anymore (3,3,3) - OFF THE AIR [CD]
25 - Prohibit workers’ language (5) - {BAN}{TU}
26 - I almost adhere to a Wagnerian heroine (6) - {I}{SOLDE(-r)}
27 - Feed distributed in hours (7) - NOURISH*
DOWN
1 - Some chip arising from Corp. room crises (14) - MICROPROCESSOR*
2 - Do save diligently, hoarding last of bay, crinkled (7) - SAVO{Y}ED
3 - Canine’s neighbour? (7) - INCISOR [CD]
4 - Complaint Emmy heaps senselessly (9) - EMPHYSEMA* This is what happens if you smoke too much
5 - Girl on old loop line (5) - LASS{O}
6 - Cha served up is no good? Annoying! (7) - {TEA}{SI<-}{NG}
7 - Non-believer is at the jumble (7) - ATHEIST*
8 - Low in spirits, a dentist might look here (4,2,3,5) - DOWN IN THE MOUTH [CD]
15 - See the woman smile at German legendary figure (9) - {LO}{HEN}{GRIN}
17 - Decanters for soldiers in restaurants (7) - CA{RA}FES
18 - Nothing in ruined chapel is of high significance (7) - EP{O}CHAL*
19 - Ram is up with Ben Adhem to see African stork (7) - {MAR<-}{ABOU}
20 - Greek character against wine of Tuscany (7) - {CHI}{ANTI}
22 - A ghostly colour? (5) - SHADE [DD]