SOLUTION TO PRIZE CROSSWORD No 15,690:

ACROSS: 1 Illustration. 8 Organic. 9 Diagram. 11 Stormproof. 12 Smut. 14 Impostor. 16 Seance. 17 Mum. 19 Gopher. 21 Tea chest. 24 Ogle. 25 Separation. 27 Kick off. 28 Tableau. 29 Undercurrent. DOWN: 1 In-group. 2 Land masses. 3 Sickroom. 4 Red-hot. 5 T-bar. 6 Oarsmen. 7 Toasting fork. 10 Mother tongue. 13 Descramble. 15 Rut. 18 Megastar. 20 Pelican. 22 Eminent. 23 Deific. 26 Rose.