YESTERDAY’S SIMPLE SOLUTION

Across: 7 Naval; 8 Evasive; 9 Tripoli; 10 Guess; 12 Arbitrator; 15 Trade union; 18 Ratio; 19 Trample; 21 Portico; 22 Elder.

Down: 1 Instructor; 2 Avoid; 3 Alto; 4 Gemini; 5 Kangaroo; 6 Liberty; 11 Strawberry; 13 Rhetoric; 14 Mastery; 16 Notion; 17 Spade; 20 Aver.