This crossword No. 13807 clues and answers were published on Sat 09 Aug 2014 and the puzzle can be visited by following The Guardian Quick Crossword No. 13807 link.
All Across Clues and Answers:
5-across – Ignition device in an internal-combustion engine : SPARKPLUG
8-across – Goad : SPUR
9-across – Chicken braised in red wine : COQAUVIN
10-across – Wretched : GROTTY
11-across – Greek mathematician, 3rd century BC : EUCLID
13-across – Connective tissue in bones : MARROW
15-across – Russian carriage pulled by three horses abreast : TROIKA
16-across – Doodlebug : BUZZBOMB
18-across – Irish port — something in a wine bottle? : CORK
19-across – Drunk : PLASTERED
All Down Clues and Answers:
1-down – Person working a switchboard : OPERATOR
2-down – Awkward : TRICKY
3-down – Not clearly expressed : OPAQUE
4-down – Religious leader : GURU
6-down – Roman slave leader — 1954 ballet composed by Aram Khachaturian — 1960 film starring Kirk Douglas : SPARTACUS
7-down – Very short item of female attire : MINISKIRT
12-down – Two quavers as one note : CROTCHET
14-down – Rushing noise : WHOOSH
15-down – Medicine — flat slab — computer : TABLET
17-down – 1964 film about the Battle of Rorke’s Drift : ZULU
This crossword has in total 20 where 10 are across and 10 are down.