This crossword No. 12378 clues and answers were published on Tue 12 Jan 2010 and the puzzle can be visited by following The Guardian Quick Crossword No. 12378 link.
All Across Clues and Answers:
1-across – Write — match : CORRESPOND
7-across – Highest peak in Great Britain : BENNEVIS
8-across – Two-masted, square-rigger : BRIG
9-across – Inert gas : NEON
10-across – Freedom : LIBERTY
12-across – Tumultuous uproar : PANDEMONIUM
14-across – Novelty : GIMMICK
16-across – Steering apparatus : HELM
19-across – Bird — talk easily : CHAT
20-across – Hooked like an eagle’s beak : AQUILINE
21-across – Prophet : SOOTHSAYER
All Down Clues and Answers:
1-down – Unspoiled : CLEAN
2-down – Dilapidated : RUNDOWN
3-down – Covetousness : ENVY
4-down – Greek god of the sea : POSEIDON
5-down – Peer : NOBLE
6-down – Maxim : DICTUM
11-down – Strong inclination : PENCHANT
12-down – Alarming predicament : PLIGHT
13-down – In a perfect world : IDEALLY
15-down – Adage : MOTTO
17-down – Landed estate : MANOR
18-down – Bother : FUSS
This crossword has in total 23 where 11 are across and 12 are down.