This crossword No. 15070 clues and answers were published on Sat 25 Aug 2018 and the puzzle can be visited by following The Guardian Quick Crossword No. 15070 link.
All Across Clues and Answers:
1-across – Code of Islamic law : SHARIA
4-across – Walked with a long bounding stride : LOPED
7-across – Promised Land of the Israelites : CANAAN
8-across – Muslim salutation offering peace : SALAAM
9-across – Present : HERE
10-across – Hard-hearted : RUTHLESS
12-across – Repeatedly over a long period : DAYINDAYOUT
17-across – Disused : OBSOLETE
19-across – High-flying songbird : LARK
20-across – Absentee from school : TRUANT
21-across – Long-tailed crow : MAGPIE
22-across – Smooth, glossy fabric : SATIN
23-across – Tense : ONEDGE
All Down Clues and Answers:
1-down – Marine algae : SEAWEED
2-down – Establishment for the advancement of knowledge : ACADEMY
3-down – Lack of knowledge : IGNORANCE
4-down – Reluctant — unwilling : LOATH
5-down – Tableland : PLATEAU
6-down – Clear condensation from : DEMIST
11-down – Skilled worker : TRADESMAN
13-down – Sudden violent attack : ASSAULT
14-down – Indebted : OBLIGED
15-down – Oval earthenware dish : TERRINE
16-down – Spanish conquistador, d.1547 : CORTES
18-down – Sheets, tablecloths etc : LINEN
This crossword has in total 25 where 13 are across and 12 are down.