Coarse cotton (6)
(Other definitions for calico that I've seen before include "Given material for dress" , "spotted in America" , "Coarse cloth with a bright print" , "Unbleached sixteen down cloth" , "White cotton fabric" .)
'coarse cotton' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for chino that I've seen before include "American material" , "Type of fabric" , "Coarse twilled cotton fabric" , "Cotton textile material" , "Durable cotton fabric" .)