Haifa hello (6)
I believe the answer is:
shalom
'haifa hello' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for shalom that I've seen before include "Jewish salutation, meaning "peace"" , "Jewish greeting and blessing" , "Hebrew "ciao"" , "Jewish expression of greeting or farewell" , "Jewish word of greeting or leave-taking" .)