This crossword No. 11457 clues and answers were published on Fri 26 Jan 2007 and the puzzle can be visited by following The Guardian Quick Crossword No. 11457 link.
All Across Clues and Answers:
1-across – Brief note, usually between co-workers : MEMO
3-across – Instrument associated with Scotland and Ireland : BAGPIPES
8-across – Ancient Roman garment : TOGA
9-across – Relevant – fabric : MATERIAL
11-across – Person arousing romantic infatuation : HEARTTHROB
14-across – Go back : RENEGE
15-across – US state, capital Carson City : NEVADA
17-across – Land of the kiwi : NEWZEALAND
20-across – Incredible story : TALLTALE
21-across – Travel permit stamped in passport etc : VISA
22-across – Italian cheese : PARMESAN
23-across – Feeble : WEAK
All Down Clues and Answers:
1-down – Dutch femme fatale executed by the French in 1917 as a German spy : MATAHARI
2-down – Severe headache often accompanied by nausea : MIGRAINE
4-down – Lack of interest : APATHY
5-down – Extraordinary – help one man : PHENOMENAL
6-down – Bucket : PAIL
7-down – Fine sediment : SILT
10-down – Large insect with branched mandibles : STAGBEETLE
12-down – Sponger : PARASITE
13-down – Ant bear : AARDVARK
16-down – Flowering shrub akin to rhododendron : AZALEA
18-down – Pace : STEP
19-down – Indistinct impression : BLUR
This crossword has in total 24 where 12 are across and 12 are down.