Kin of au revoir (5)
I believe the answer is:
adieu
(Other definitions for adieu that I've seen before include "A valediction" , "Leave" , "Some say it when leaving" , "12 Down" , "Farewell, adios" .)
I believe the answer is:
adieu
(Other definitions for adieu that I've seen before include "A valediction" , "Leave" , "Some say it when leaving" , "12 Down" , "Farewell, adios" .)