CRYPTIC CROSSWORD No. 16,568

ACROSS: 6 Wellington boot. 9 Editor. 10 Proceeds. 11 Eminence. 13 Ascent. 15 Non-fat. 17 Oyster. 19 Victim. 20 Abstruse. 22 Mnemonic. 24 Unreal. 26 Claustrophobia.

DOWN: 1 Two-dimensional. 2 Plot. 3 Citron. 4 Coronary. 5 Oboe. 7 Gopher. 8 Ordinary seaman. 12 Nonet. 14 Cater. 16 Ammonite. 18 Gaucho. 21 Sought. 23 Maul. 25 Robe.