Hawaiian expression (5)
I believe the answer is:
aloha
'hawaiian expression' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for aloha that I've seen before include "A halo seen in Polynesian greeting" , "Hawaiian "ciao"" , "Hello from Honolulu?" , "A Hawaiian welcome" , "Hawaiian farewell" .)