Yesterday’s solutions:

Across: 1 Darken. 4 Submit. 9 Recrudescence. 10 Collect. 11 Unfit. 12 Fiery. 14 Chase. 18 Lurid. 19 Archaic. 21 Contamination. 22 Deepen. 23 Skinny.

Down: 1 Direct. 2 Recalcitrance. 3 Elude. 5 Uncouth. 6 Manifestation. 7 Treaty. 8 Petty. 13 Radiate. 15 Placid. 16 Basic. 17 Scanty. 20 Crack.