Quick –

No. 16, 454

Across: 1 Jerk; 3 Thickset; 8 Akin; 9 Surmount; 11 On the decline; 13 Sorrow; 14 School; 17 Pay attention; 20 Initiate; 21 Diva; 22 Nonsense; 23 Knee.

Down: 1 Jealousy; 2 Roister; 4 Hauled; 5 Complacent; 6 Spurn; 7 Tote; 10 Decorative; 12 Elongate; 15 Opinion; 16 Status; 18 Alien; 19 Sign.