This crossword No. 667 clues and answers were published on Sun 29 Jun 2008 and the puzzle can be visited by following The Guardian Speedy Crossword No. 667 link.
All Across Clues and Answers:
1-across – Pen : AUTHOR
4-across – Outcome : UPSHOT
8-across – Represses an emotion : BITES
9-across – See 8 : ONESLIP
10-across – Form of rummy using two decks of cards and four jokers : CANASTA
11-across – Slacker : IDLER
12-across – Sing Holst? : SLINGSHOT
17-across – Deeply distressed : CUTUP
19-across – Syrup-like substance : TREACLE
21-across – Exaggerate or overemphasise something : LAYITON
22-across – See 21 : THICK
23-across – Hate a lot : DETEST
24-across – Merriment : GAIETY
All Down Clues and Answers:
1-down – Jurisdiction of a Father Superior : ABBACY
2-down – Lockjaw : TETANUS
3-down – A place of safety or sanctuary : OASIS
5-down – Sulky : PEEVISH
6-down – Meat slaughtered in accordance with Islamic law : HALAL
7-down – Diminishes gradually : TAPERS
9-down – Ape of Borneo and Sumatra : ORANGUTAN
13-down – Force that moves something along : IMPETUS
14-down – Haptic : TACTILE
15-down – Surmounted : SCALED
16-down – Hebdomadal : WEEKLY
18-down – Pre-arranged : TRYST
20-down – Sundry : EXTRA
This crossword has in total 26 where 13 are across and 13 are down.