WEDNESDAY’S SOLUTION (No 7,868):

ACROSS: 1 Mayhem. 4 Sisal. 7 Inaccuracy. 8 Acme. 9 Abhor. 11 Slander. 13 Luggage. 15 Tithe. 17 Beef. 18 Chandelier. 20 Taper. 21 Air bed. DOWN: 1 Molars. 2 Hone. 3 Michael. 4 Sauna. 5 Sea. 6 Layer. 7 Impact. 10 Header. 12 Rubella. 14 Enfold. 15 Tacit. 16 Eider. 17 Beer. 19 Alp.