Sandwich bread (3)
(Other definitions for roll that I've seen before include "Cylinder (of paper etc)" , "Bakery product" , "Official list of members" , "Gymnastic move; bread" , "one filled at lunchtime, perhaps" .)
'sandwich bread' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for rye that I've seen before include "Grass - whiskey" , "old port" , "21 [GRASS]" , "Grain - whiskey - port" , "place in East Sussex" .)