15 across
Part
of
quiche
Lorraine
slice
sent
back
(4)
Part of quiche Lorraine slice sent back (4)
hints
0
checks
0
hints
The definition is at the beginning of the clue.
How the clue works
The definition is Part — a role or portion. "Slice" tells you the answer is hiding inside the phrase, and "sent back" means you read it backwards — look at "quichE LORraine" and reverse those hidden letters to get your answer.