___ and Kings , 1904 O Henry novel set in a fictitious Republic of Anchuria (8)
I believe the answer is:
cabbages
(Other definitions for cabbages that I've seen before include "Greens" , "Leafy green vegetables" , "''Of shoes - and ships - and sealing wax / Of ... - and kings'' (Lewis Carroll)" , "Of shoes and ships and ceiling wax,/ of . . . . . . . . and kings (Through the Looking Glass)" , "Brassicas" .)