SOLUTION TO PRIZE CROSSWORD No 15,565:

ACROSS: 1 Unassailable. 8 Light up. 9 Corncob. 11 Inaugurate. 12 Oral. 14 Plectrum. 16 Renown. 17 Gen. 19 Reader. 21 Nicotine. 24 Able. 25 Lengthened. 27 Tugboat. 28 Imburse. 29 Looking glass. DOWN: 1 Upgrade. 2 Altogether. 3 Superbug. 4 Incite. 5 Acre. 6 Locarno. 7 Allimportant. 10 Balanced diet. 13 Xenophobia. 15 Men. 18 Niggling. 20 Allegro. 22 Innards. 23 Keaton. 26 Soak.