This crossword No. 15138 clues and answers were published on Tue 13 Nov 2018 and the puzzle can be visited by following The Guardian Quick Crossword No. 15138 link.
All Across Clues and Answers:
1-across – Small streams : BROOKS
4-across – Declaration : AVOWAL
8-across – Framework of metal bars : GRILL
9-across – Fill with fear : TERRIFY
10-across – Refrain : FORBEAR
11-across – External : OUTER
12-across – Remiss : NEGLIGENT
17-across – Opening passage : INTRO
19-across – Lufthansa, for example : AIRLINE
21-across – Long-lasting : DURABLE
22-across – Prodded : POKED
23-across – Reddish brown : RUSSET
24-across – Cling : ADHERE
All Down Clues and Answers:
1-down – Ask for permission to be released : BEGOFF
2-down – Foreign letter — I’m no roc : OMICRON
3-down – Dannii M’s older sister : KYLIE
5-down – Long-winded : VERBOSE
6-down – Card game for four : WHIST
7-down – Levels : LAYERS
9-down – Stop : TERMINATE
13-down – Farewell : GOODBYE
14-down – Scintillate : TWINKLE
15-down – German Romantic songs for solo voice : LIEDER
16-down – Interfere : MEDDLE
18-down – Mountain lakes : TARNS
20-down – Speedy : RAPID
This crossword has in total 26 where 13 are across and 13 are down.