FRIDAY’S SOLUTION —

ACROSS: 1 I had no idea. 7 Abyss. 8 Call-out. 11 Guano. 13 Alter. 14 Maigret. 16 Radii. 18 Rockhopper.

DOWN: 2 Hay. 3 Discover. 4 Idol. 5 All-terrain. 6 Bad grammar. 9 Lay a trap. 10 Omit. 12 Anti. 15 Gawk. 17 Doe.