Yesterday’s solutions:

Across: 1 Coop. 4 Suppress. 10 Internal revenue. 11 Appoint. 12 Salient. 13 Assist. 14 Interpol. 17 Resonant. 19 Athena. 23 Recital. 25 Hibachi. 26 The coast is clear. 27 Worked up. 28 Oath.

Down: 2 Octopuses. 3 Parties. 4 Sparta. 5 Perusing. 6 Revolve. 7 Sense. 8 Cicada. 9 Lentil. 15 Prescient. 16 Enclosed. 17 Rarity. 18 Network. 20 Tobacco. 21 Aviary. 22 Shrimp. 24 Credo.