Type of savoury tart (6)
I believe the answer is:
quiche
'type of savoury tart' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for quiche that I've seen before include "Cheese and bacon pastry dish" , "Open tart with egg filling" , "Open tart with savoury egg filing" , "Egg dish" , "French dish?" .)