This crossword No. 13159 clues and answers were published on Thu 12 Jul 2012 and the puzzle can be visited by following The Guardian Quick Crossword No. 13159 link.
All Across Clues and Answers:
5-across – Spanish region, capital Seville : ANDALUSIA
8-across – Nothing : ZERO
9-across – Effrontery : CHUTZPAH
10-across – Unpleasantly humid : CLAMMY
11-across – Smart : BRIGHT
13-across – Hanging fold of skin on neck : DEWLAP
15-across – Great suffering : MISERY
16-across – Reproduce : MULTIPLY
18-across – Meat from the lower back : LOIN
19-across – Style of jazz from New Orleans : DIXIELAND
All Down Clues and Answers:
1-down – Casual : INFORMAL
2-down – : CATCHY
3-down – Area on the outskirts of a city : SUBURB
4-down – State of agitation : TIZZ
6-down – Prince of Darkness : BEELZEBUB
7-down – Cleansing — purifying : CATHARTIC
12-down – Rude : INSOLENT
14-down – Ribbed fabric : POPLIN
15-down – Short-lived insect : MAYFLY
17-down – Excursion : TRIP
This crossword has in total 20 where 10 are across and 10 are down.