This crossword No. 21750 clues and answers were published on Tue 23 Nov 1999 and the puzzle can be visited by following The Guardian Cryptic Crossword No. 21750 link.
All Across Clues and Answers:
1-across – Got Sir Andrew to back some thoroughbred : ARISTO
4-across – Mass introduction when work unit enters drill square : ASPERGES
9-across – Native aphrodisiac? : OYSTER
10-across – One can’t miss this farm entrance : BARNDOOR
11-across – Oversupply with little time for lake method, perhaps : FLOODTHEMARKET
13-across – With two sovereigns to pay back, ‘e’s made Primate of the Rock : BARBARYAPE
14-across – Where marriages end in mere nothings : RENO
16-across – Des Anglais promenade here when it’s fine : NICE
18-across – Informer and offspring brought before the beak! : CANARYSEED
21-across – 5’s work of sorcery from ode composition : COMEDYOFERRORS
23-across – The way strength of character is an aid to winter driving : ROADGRIT
24-across – I’m Prince Henry: where’s the battle? : IMPHAL
25-across – Spot cash for Alec Leamas? : SPYMONEY
26-across – Lit up? B-bingo! : BLOTTO
All Down Clues and Answers:
1-down – On which 8 is found with a German 1 across? : AVON
2-down – Man is so narrow-minded : INSULAR
3-down – My plays are here! : THEROYAL
5-down – 8 on 1 down’s raison d’etre? : SHAKESPEARE
6-down – 9 Greek pieces in French and English translation : ENNEAD
7-down – G-Gibraltar rejecting the Spanish tourist : GROCKLE
8-down – Doctor of fallen women elevated on 1 down : STRATFORD
12-down – Parasite killer’s attempt on father: I’d say the game’s up! : TRYPANOCIDE
13-down – Guarantors lean toward eccentrics : BANKCARDS
15-down – My Lord! He brewed mead! : HYDROMEL
17-down – See 3 : COMPANY
19-down – Not a sound out of it : EARSHOT
20-down – Slow passage from a soldier in difficulty : ADAGIO
22-down – Cracked peal from Calliope leaves her sister standing : CLIO
This crossword has in total 28 where 14 are across and 14 are down.