Started with a quiche (4)
I believe the answer is:
tart
'a quiche' is the definition.
(thesaurus)
'started with' is the wordplay.
'with' says the answer is hidden in the clue.
'TART' can be found hidden inside 'started'.
(Other definitions for tart that I've seen before include "Tom" , "Open-topped pie" , "Sharp or sour in taste" , "Of taste, sharp or acid" , "sour type of pie" .)