This crossword No. 21642 clues and answers were published on Tue 20 Jul 1999 and the puzzle can be visited by following The Guardian Cryptic Crossword No. 21642 link.
All Across Clues and Answers:
1-across – Work out how to effect seizure of donjon? : KEEPFIT
5-across – Plain cake saw? : NOTICED
9-across – A month without choral work, he’d like the mob to rule : OCHLOCRAT
10-across – Snowman, as it were, in the French fashion, to work the other way : LEWIS
11-across – Pieces of second-hand quartz? : SAND
12-across – Novelist wrote bad things before residence in Tyneside : NEVILSHUTE
14-across – Bible translator, the first person in French and Latin city : JEROME
15-across – 19 or 11 and 24 : GEORGES
16-across – I get a drink when back to fighting Japanese : SAMURAI
18-across – Frail insect eating a single document : FLIMSY
20-across – She was Hectored, with memory suffering : ANDROMACHE
21-across – In the bathroom I try to skip : OMIT
24-across – See 10 : ELIOT
25-across – Seminarians from Breton town dividing gold and diamonds : ORDINANDS
26-across – Approval of archbishop being in hell? : PLAUDIT
27-across – What could possibly go with West London sky? I’ve no idea! : GODONLY
All Down Clues and Answers:
1-down – See 27 : KNOWS
2-down – Improve and ruin English Channel, nearly : ENHANCE
3-down – Sweet and silly? : FOOL
4-down – 14, one of the 15, and 10’s other half were a menace, with me a bonnie mess inside … : THREEMENINABOAT
5-down – … see 22 : NOTHINGOFTHEDOG
6-down – In a supermarket the French film is invisible to the naked eye : TELESCOPIC
7-down – Pat’s constituent reportedly intimidated and suspended? : COWDUNG
8-down – They sleep rough, so dress is a problem : DOSSERS
13-down – Quadruped’s need of food: true? False : FOURFOOTED
16-down – Have a meal, eating fish, causing a disturbance : SHAKEUP
17-down – Island produced a change of air : MADEIRA
19-down – Writer of detective stories puts people in heaven : SIMENON
22-down – … not to mention their friend, awful fogy in hat, honest to God! : TOSAY
23-down – Eat up, girl! : ENID
This crossword has in total 30 where 16 are across and 14 are down.