This crossword No. 12104 clues and answers were published on Tue 24 Feb 2009 and the puzzle can be visited by following The Guardian Quick Crossword No. 12104 link.
All Across Clues and Answers:
1-across – Person whose earnings support the family : BREADWINNER
9-across – Instrument for measuring height : ALTIMETER
10-across – Worthless dog : CUR
11-across – Regular drinker : TOPER
13-across – Rest : LIEDOWN
14-across – One making proclamations — harbinger : HERALD
15-across – Indulgence in costly pleasures : LUXURY
18-across – Congenial : AFFABLE
20-across – Vaporised water : STEAM
21-across – Serpentine fish : EEL
22-across – Instantly : LIKEASHOT
24-across – Power derived from the sun : SOLARENERGY
All Down Clues and Answers:
2-down – Rodent — deserter : RAT
3-down – Chief commander of fleet : ADMIRAL
4-down – Loose skin on cockerel’s throat : WATTLE
5-down – Cool courage : NERVE
6-down – Area fenced off — one’s ulcer : ENCLOSURE
7-down – One treating the sick by means of religious belief : FAITHHEALER
8-down – Variety of apple : GRANNYSMITH
12-down – Case for loose paper, drawings etc : PORTFOLIO
16-down – Steal the show : UPSTAGE
17-down – Shout disruptively at performer : HECKLE
19-down – Tree with light soft wood : BALSA
23-down – Old witch-like woman : HAG
This crossword has in total 24 where 12 are across and 12 are down.