Greek bread (5)
I believe the answer is:
pitta
'greek bread' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for pitta that I've seen before include "Flat sort of bread" , "Type of flat bread that's split to hold a filling" , "I might have a kebab in" , "(E.g. Greek) bread" , "Flat bread that's split to take a filling" .)