PREVIOUS SOLUTION

Across: 1 Paper-chain; 8 Swear; 9 Resound; 10 Mission; 11 Abide; 12 Angel-fish; 15 Ju(g)ice; 17 Gearbox; 19 Robotic; 20 Plaid; 21 Epaulettes.

Down: 2 Abets; 3 (Y)Earning; 4 Chronological; 5 At sea 6 Nourish; 7 Adze; 8 Sump; 12 Amiable; 13 In a spot; 14 Axed; 15 Jars; 16 Extra; 18 Brace.