This crossword No. 1129 clues and answers were published on Sun 21 May 2017 and the puzzle can be visited by following The Guardian Speedy Crossword No. 1129 link.
All Across Clues and Answers:
1-across – Stream : BECK
3-across – Move to the next stage : GRADUATE
8-across – Sect : CULT
9-across – Ingratiating : UNCTUOUS
11-across – Child of the mid 20th century : BABYBOOMER
14-across – Gossip : NATTER
15-across – Courageous : PLUCKY
17-across – Isolate : QUARANTINE
20-across – Fail to convince : CUTNOICE
21-across – Festival : GALA
22-across – Imagination : MINDSEYE
23-across – Gusto : ZEST
All Down Clues and Answers:
1-down – Spine : BACKBONE
2-down – Continent : CELIBATE
4-down – Payment to kidnapper : RANSOM
5-down – Site for signature : DOTTEDLINE
6-down – Berserk : AMOK
7-down – Simple : EASY
10-down – Fawning : OBSEQUIOUS
12-down – Set in motion : ACTIVATE
13-down – Stereotype : TYPECAST
16-down – Expensive : PRICEY
18-down – Swindle : SCAM
19-down – Concuss : STUN
This crossword has in total 24 where 12 are across and 12 are down.