SOLUTION TO PRIZE CROSSWORD No 15,421:

ACROSS: 6 Traffic islands. 9 Bamboo. 10 Embolism. 11 Agnostic. 13 Lizard. 15 Trilby. 17 Balsam. 19 Camera. 20 Annoying. 22 Skinhead. 24 Mighty. 26 Standard-bearer. DOWN: 1 Straightjacket. 2 Barb. 3 Afloat. 4 Isabella. 5 Sail. 7 Clench. 8 Discriminatory. 12 Olive. 14 Zesty. 16 Brake pad. 18 Candid. 21 Number. 23 Nine. 25 Gore.