Last solution

Across: 1 Stiff-necked; 9 Pennant; 10 Abate; 11 Cheat; 12 Restive;

13 Accent; 15 Cognac; 18 Upright; 20 Angel; 22 Alien; 23 Ominous;

24 Orderliness.

Down: 2 Tinge; 3 Flatten; 4 Nature; 5 Class; 6 Evasion; 7 Spectacular;

8 Defenceless; 14 Carrier; 16 Oration; 17 Stroll; 19 Genre; 21 Gross.