Apple or potato variety (6)
I believe the answer is:
russet
I believe this clue is a double definition.
'apple' is the first definition.
(a russet-coloured apple)
'potato variety' is the second definition.
(I've seen this in another clue)
(Other definitions for russet that I've seen before include "Autumn red" , "Brown with a reddish tinge" , "Reddish-brown - type of apple" , "Dessert apple" , "Red/brown; a fabric; an apple" .)