This crossword No. 1277 clues and answers were published on Sun 22 Mar 2020 and the puzzle can be visited by following The Guardian Speedy Crossword No. 1277 link.
All Across Clues and Answers:
5-across – Not privy to information : INTHEDARK
8-across – Search thoroughly : COMB
9-across – Short amusing story : ANECDOTE
10-across – Most strange : ODDEST
11-across – Quality of voice : TIMBRE
13-across – Supplication : PRAYER
15-across – Essential part : MARROW
16-across – Fraud : IMPOSTOR
18-across – Stringed musical instrument : HARP
19-across – Inappropriate, outside the rules : OUTOFLINE
All Down Clues and Answers:
1-down – Pretentiousness : SNOBBERY
2-down – Frustrate : THWART
3-down – Coming, arrival : ADVENT
4-down – Rectangular nail : BRAD
6-down – Small greenhouse : COLDFRAME
7-down – Right side of a ship : STARBOARD
12-down – Tradesman : MERCHANT
14-down – Allotment : RATION
15-down – Spirit, enthusiasm : MORALE
17-down – Egg : OVUM
This crossword has in total 20 where 10 are across and 10 are down.