This crossword No. 813 clues and answers were published on Sun 17 Apr 2011 and the puzzle can be visited by following The Guardian Speedy Crossword No. 813 link.
All Across Clues and Answers:
1-across – Writer : SCRIBE
4-across – Hidden, secret : COVERT
9-across – Early settler : PIONEER
10-across – Saloon car : SEDAN
11-across – Famous : NOTED
12-across – Make out, distinguish : DISCERN
13-across – Student of diseases : PATHOLOGIST
18-across – Tableland : PLATEAU
20-across – Ingenuous : NAIVE
22-across – Straight lines from centre of a circle : RADII
23-across – Having a will : TESTATE
24-across – Offer : TENDER
25-across – Climb : ASCEND
All Down Clues and Answers:
1-down – Lying on back : SUPINE
2-down – Perch : ROOST
3-down – Latitude, broadness : BREADTH
5-down – Fertile spot : OASIS
6-down – Eternal : ENDLESS
7-down – Resident : TENANT
8-down – Honeymoon venue : BRIDALSUITE
14-down – Desert : ABANDON
15-down – Birth, beginnings : GENESIS
16-down – Phantom, ghost : SPIRIT
17-down – Decapitate : BEHEAD
19-down – Omit a vowel : ELIDE
21-down – Foolish : INANE
This crossword has in total 26 where 13 are across and 13 are down.