Thin biscuit (5)
(Other definitions for brown that I've seen before include "cook to a rich colour?" , "Rugby hero" , "It is used for wrapping" , "Chocolate, perhaps" , "Colour (of the PM?)" .)
(Other definitions for beige that I've seen before include "Light brown" , "Fawn or buff" , "Shade of brown" , "Pale sandy fawn colour" , "Pale brown" .)
(Other definitions for brain that I've seen before include "Seat of the intellect" , "to get hit over the head" , "It's in the skull" , "Intellectual ability" , "Organ of the intellect" .)
'thin biscuit' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for wafer that I've seen before include "Ice-cream biscuit" , "A very thin plain biscuit" , "Host's" , "Disc of bread" , "Ice cream's biscuit" .)
(Other definitions for flour that I've seen before include "Ground and sifted cereal grain meal" , "Powder for cooking" , "White powder" , "It;s made from grinding cereal grain" , "Cake ingredient" .)
(Other definitions for scone that I've seen before include "Small plain cake and Scottish town" , "Perth's settlement" , "Scottish location" , "Unsweetened cake" , "Savoury cake" .)