This crossword No. 15153 clues and answers were published on Fri 30 Nov 2018 and the puzzle can be visited by following The Guardian Quick Crossword No. 15153 link.
All Across Clues and Answers:
1-across – Have the opposite and damaging effect to that intended : BACKFIRE
5-across – : IBID
9-across – Popular dance music of the 1970s : DISCO
10-across – Thick sugar paste used for icing cakes : FONDANT
11-across – Person in their sixties : SEXAGENARIAN
13-across – Orion — pocket watch with a hinged protective lid : HUNTER
14-across – Nocturnal wild cat of Central and South America : OCELOT
17-across – Noisily aggressive : OBSTREPEROUS
20-across – Rotary engine : TURBINE
21-across – Wide — impenetrable : THICK
22-across – Panache : ELAN
23-across – Log store : WOODSHED
All Down Clues and Answers:
1-down – Cots, bunks etc — eastern English county : BEDS
2-down – Toilet water reservoir : CISTERN
3-down – Soft fresh cheese, like thick yogurt : FROMAGEFRAIS
4-down – Automatic action : REFLEX
6-down – Indian dish consisting of vegetables deep fried in batter : BHAJI
7-down – Explode : DETONATE
8-down – Banged up : INCARCERATED
12-down – Song thrush — short let : THROSTLE
15-down – Uncouth : LOUTISH
16-down – Swimming briefs trademark : SPEEDO
18-down – Middle East country, capital Damascus : SYRIA
19-down – Slide out of control : SKID
This crossword has in total 24 where 12 are across and 12 are down.