Flatbread (5)
I believe the answer is:
pitta
'flatbread' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for pitta that I've seen before include "Bread pocket" , "Type of flat bread that's split to hold a filling" , "Greek unleavened bread" , "Type of flatbread" , "Slightly leavened bread" .)