This crossword No. 26597 clues and answers were published on Sat 13 Jun 2015 and the puzzle can be visited by following The Guardian Prize Crossword No. 26597 link.
All Across Clues and Answers:
1-across – Musical group, possibly retro, has to tour clubs : ORCHESTRA
6-across – Musical group, possibly retro? : ABBA
8-across – Honey Honey, Mamma Mia! : DEARDEAR
9-across – Urge party to take a fifth of 6 across’s number? : LIBIDO
10-across – Babble as baby, Dancing Queen! : YABBER
11-across – 6 across’s great loss : WATERLOO
12-across – Before 1002, I diminish in value : IMPAIR
15-across – Lunatic pleased to accommodate one bright group of relatives? : PLEIADES
16-across – A shade raised around stack : BRICKRED
19-across – Keyboard operator extremely twitchy, something of a nut? : TYPIST
21-across – 6 across’s number outlining case for the inquirer : SOCRATES
22-across – Drunk first of brandies — take a chance on me! : BLOTTO
24-across – Drink, last bit dropped on envelope : COCOON
25-across – Peculiar play with Act 1 at sea : ATYPICAL
26-across – PM’s first words got Fernando confused with Ring Ring? : GOOD
27-across – See 26 : AFTERNOON
All Down Clues and Answers:
1-down – Greek character taking up long and short periods : OMEGA
2-down – Parts of an organ in church bear cracks — that’s about right : CEREBRA
3-down – Islamic ruler of supreme erudition : EMEER
4-down – Give up one’s dinner hour with pained expression, sheep being passed round : THROWUP
5-down – Share totally exaggerated, people claimed : ALLOTMENT
6-down – A singer shortly going north, south of a Canadian province : ALBERTA
7-down – Primarily counterpanes observed being spread out? : BEDCOVERS
13-down – Old travelling merchant bringing old stuff over — that’s the name of the game! : MARCOPOLO
14-down – Song written up about topless prude in mythical kingdom : RURITANIA
17-down – All passengers in Italy, Charles and Bill : CARLOAD
18-down – Mr O’Connor hasn’t the talent to be a singer : DESCANT
20-down – Qualification is secured by college official — no way! : PROVISO
22-down – Customer taking massage the wrong way, you getting squeezed? : BUYER
23-down – Match captivating a US author : TWAIN
This crossword has in total 30 where 16 are across and 14 are down.