Spanish farewell (5)
I believe the answer is:
adios
'spanish farewell' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for adios that I've seen before include "so long abroad" , "See you in Ibiza" , "Goodbye (Spanish)" , "Farewell amigo!" , "Good-bye (Sp.)" .)