Flour type (5)
(Other definitions for spelt that I've seen before include "Made up a word" , "Given letter by letter; wheat" , "Kind of wheat" , "cereal" , "Inferior species of wheat" .)
(Other definitions for rye that I've seen before include "21 [GRASS]" , "East Sussex resort" , "Hardy annual cereal grass" , "J D Salinger novel 'The Catcher in the ...'" , "A Cinque Port; a grain" .)