"Farewell, chérie" (5)
I believe the answer is:
adieu
'farewell cherie' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for adieu that I've seen before include "12 Down" , "the last word in Paris" , "Farewell, Monsieur!" , "Some say it when leaving" , "Vale" .)