This crossword No. 10509 clues and answers were published on Mon 12 Jan 2004 and the puzzle can be visited by following The Guardian Quick Crossword No. 10509 link.
All Across Clues and Answers:
1-across – Statue’s base : PLINTH
4-across – Bee? – used in place of a door bell : BUZZER
9-across – Bright light used in poor driving conditions : FOGLAMP
10-across – Barriers : WALLS
11-across – Surplus : EXTRA
12-across – Position on a scale : RANKING
13-across – River with falls in Wyoming : YELLOWSTONE
18-across – Fish tanks : AQUARIA
20-across – Relative : NIECE
22-across – Ate : DINED
23-across – Look or glance supposed to cause harm : EVILEYE
24-across – Moves into position : TAXIES
25-across – Difficult – intricate : KNOTTY
All Down Clues and Answers:
1-down – Smoker – globefish : PUFFER
2-down – Piece of cast metal : INGOT
3-down – Excessive labour : TRAVAIL
5-down – Stanley ___, late creator of a gibberish language : UNWIN
6-down – Unspecified enormous number : ZILLION
7-down – Hand in one’s notice : RESIGN
8-down – Large marine creatures hunted for ambergris : SPERMWHALES
14-down – March 21st or September 23rd : EQUINOX
15-down – Stress : TENSION
16-down – Desperado : BANDIT
17-down – ___ Paxman, broadcaster : JEREMY
19-down – Top of roof or incline : RIDGE
21-down – Expel : EJECT
This crossword has in total 26 where 13 are across and 13 are down.