Cry of praise (7)
I believe the answer is:
hosanna
'cry of praise' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hosanna that I've seen before include "Exclamation of praise to God, from Hebrew" , "Said in praise of God" , "A cry of adoration to God" , "Adoring cry" , "Shout of acclamation" .)