No 9474, Saturday, 07 Mar 09, Gridman

At first glance thought 4D and 10D were a printers error, turned out to be different answers however. don't know if 25A is correct as I could not find it anywhere. Not providing many links or remarks as I have a dental appointment
ACROSS
 1 -Hasten extra to peak in Black Hills (8) - RUSH{MORE}
 5 - You heard undies I discarded abroad are still in the original package (6) - {U}NUSED* (undies - i)
 9 - Cutting tart (7) - CAUSTIC [2]
10 - Advocates will speak volumes for this (7) - LAWBOOK [CD]
11 - How sweater-makers may hang together (5-4) - CLOSE KNIT [CD]
12 - Send stopwatch back (5) - REMIT<- 13 - Flier gets supply to edge of Erode (4) - KIT{E}
14 - Circumnavigate the donkey right within the enclosure (4,5) - P{ASS} {R}OUND
17 - Formidable task that high-rise builders can fulfil (4,5) - TALL ORDER [CD]
19 - Worst defeat? (4) - BEAT [2]
23 - Examine accounts of praise without backing of record (5) - AUDIT (plaudit - pl)
24 - When one might hear “ayes” and “nays” (5,4) - VOICE VOTE [CD]
25 - Hairstyle in the billiards room? (3-4) - CUE BALL [2] I suppose this is a kind of hairstyle the ladies sport and looks like a figure of eight
26 - List in chapter on business (7) - IN{C}LINE
27 - Hear Catalogue X is without its cover (6) - LIST{EN}
28 - Kind of bowling that’s not cricket! (8) - UNDERARM [CD]
DOWN
 1 - Angry Eric to get crusty dish (4,4) - RICE* CAKE [CD]
 2 - Screened from view (4-3) - SHUT OUT [CD]
 3 - Mean something to discuss (6) - MATTER [CD]
 4 - If a book is this, it is most likely to be on the front shelf of a shop (6,7) - RECENT ARRIVAL [CD]
 6 - One to give you a proverbially clean sweep? (3,5) - NEW BROOM [CD]
 7 - He can’t stand the heat! (7) - SNOWMAN [CD]
 8 - All right to rise with facts marshalled about old commercial plane (6) - DA{KO<-}TA The HINDU used to have one to deliver its paper, wonder if they still have it
10 - If a book is this, it is most likely to be on the front shelf of a shop (6,7) - LATEST EDITION [CD]
15 - How much that apartment costs? Anyway, you can’t negotiate! (4,4) - FLAT RATE [CD]
16 - Tau and he-men scattered around the reading room (8) - ATHENEUM* Not sure as again I could not find a direct definition for it
18 - You can’t find one who does not have it, so to speak (7) - ADDRESS [2]
20 - Former wife has one coat scattered among Bohemian stuff (7) - {EX}OT{I}CA*
21 - Car’s crashed by a learner. The rogue! (6) - RASCAL*
22 - Engineer’s getting the stimulus for salvation (6) - RES{CUE}