TUESDAY’S SOLUTION (No 7,939):

ACROSS: 1 Retreat. 5 Lisp. 7 Lit. 8 Heatwave. 9 Venom. 10 Club. 13 Lava. 14 Noun. 18 Mail. 19 In fun. 21 Generous. 22 Ike. 23 Tory. 24 Teaches. DOWN: 1 Relevant. 2 Titanium. 3 Exhume. 4 Thatch. 5 Lawful. 6 Save. 11 Bad faith. 12 Saunters. 15 Namely. 16 Almost. 17 Siesta. 20 Zero.