TUESDAY’S SOLUTION (No. 8,166) —

ACROSS: 1 Observe. 5 Pike. 7 Sir. 8 Modulate. 9 React. 10 Neat. 13 Reap. 14 Keep. 18 Rife. 19 Titan. 21 Migraine. 22 Tar. 23 Here. 24 Nestles. DOWN: 1 On strike. 2 Streaker. 3 Remote. 4 Ending. 5 Pillar. 6 Kite. 11 Teetotal. 12 Up in arms. 15 Pierce. 16 Legion. 17 Stress. 20 Mile.