Last solution

Across: 7 Reign; 8 Tremble; 9 Look out; 10 Allow; 12 Speculated; 15 Retrograde; 18 Lapse; 19 Shelter; 21 Unaided; 22 Drama.

Down: 1 Trilateral; 2 Pivot; 3 Undo; 4 Static; 5 Recalled; 6 Ability; 11 Widespread; 13 Proceeds; 14 Stopgap; 16 Reside; 17 Stray; 20 Eddy.