ACROSS
1 Small Welsh river-boats (8)
5 US space agency (4)
9 A bunch of twigs for sweeping (5)
10 Merciful (7)
11 Attended a protest march (12)
13 Most up-to-date (6)
14 Inequitable (6)
17 Dowser (5-7)
20 City in Florida (7)
21 Eagle's nest (5)
22 Boy's name (4)
23 Grabbed (8)
DOWN
1 Six-sided solid body (4)
2 Deference (7)
3 Act forcefully (coll) (4,2,6)
4 Sign up (6)
6 Proficient (5)
7 Agent counteracting poison (8)
8 Relentless (12)
12 Put the brakes on (4,4)
15 Bring to light (7)
16 Renounce (6)
18 Delicate fabric (5)
19 A stock of cattle (4)
Wednesday's solution
Across: 1 Elementary, 7 Particle, 8 Moan, 9 Float, 10 Grenade, 12 Countersigned, 15 Blemish, 17 Party, 20 Wall, 21 European, 22 Parliament.Down: 1 Email, 2 En train, 3 Etch, 4 Theorist, 5 Roman, 6 Candle, 11 Seashell, 13 Oilcan, 14 Grapple, 16 Melba, 18 Toast, 19 Aria.