Old Indian currency note turned up, praise be (7)
I believe the answer is:
hosanna
'praise be' is the definition.
(I've seen this before)
'old indian currency note turned up' is the wordplay.
'old indian currency' becomes 'anna' (I can't explain this - if you can you should give a lot more credence to this answer).
'note' becomes 'soh' (I've seen this before).
'turned up' says the letters should be written backwards.
'anna'+'soh'='annasoh'
'annasoh' reversed gives 'HOSANNA'.
Can you help me to learn more?
(Other definitions for hosanna that I've seen before include "Said in praise of God" , "exclamation of joy" , "A cry of praise to God, from Hebrew" , "Exclamation of praise to God, from Hebrew" , "Hebrew word in the Bible, an exclamation of praise" .)