Word on the way out? (5)
I believe the answer is:
adieu
'word on the way out?' 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 "Goodbye, mon ami!" , "cheers" , "Adios, Arrivederci" , "Au revoir (to a kind friend?)" , "I'm away (in France?)" .)