This crossword No. 11832 clues and answers were published on Thu 10 Apr 2008 and the puzzle can be visited by following The Guardian Quick Crossword No. 11832 link.
All Across Clues and Answers:
1-across – Unmarried woman cohabiting with a man – secondary wife : CONCUBINE
8-across – Contented sound of cat : PURR
9-across – Construction in hive : HONEYCOMB
10-across – Notion : IDEA
13-across – Domain : REALM
15-across – Creator of written work : AUTHOR
16-across – Castrated male, often guard in harem : EUNUCH
17-across – Persistent resentment : GRUDGE
19-across – Mariner : SAILOR
20-across – Nut tree : HAZEL
21-across – List assigning turns of duty : ROTA
24-across – Bribe – sugar substitute : SWEETENER
25-across – Geek : NERD
26-across – First class : EXCELLENT
All Down Clues and Answers:
2-down – Woodwind instrument : OBOE
3-down – Principal cook : CHEF
4-down – Squabble : BICKER
5-down – Light and quick in movement : NIMBLE
6-down – Multiply by two, twice : QUADRUPLE
7-down – Betrayal : TREACHERY
11-down – Butter substitute : MARGARINE
12-down – Building : STRUCTURE
13-down – Unpolished : ROUGH
14-down – Large wall painting : MURAL
18-down – Secretion from aural glands : EARWAX
19-down – Hard to endure : SEVERE
22-down – Metal ringer : BELL
23-down – Intend – miserly : MEAN
This crossword has in total 28 where 14 are across and 14 are down.