Bread with filling (8)
I believe the answer is:
sandwich
'bread with filling' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for sandwich that I've seen before include "Two slices with something in between" , "Snack with bread" , "Filled sponge cake" , "Layered sponge cake" , "Picnic food" .)