Farewell, in French (5)
I believe the answer is:
adieu
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">farewell in french</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for adieu that I've seen before include "Comment on leaving" , "Goodbye, mon ami!" , "Ciao, in French" , "Adios, Arrivederci" , "Gallic goodbye" .)