New name - the last word in prayer (4)
I believe the answer is:
amen
'word in prayer' is the definition.
'amen' can be an answer for 'word' (I have seen 'Word of agreement' mean 'amen' so perhaps 'word' could also mean 'amen'). I'm unsure of the 'in prayer' bit.
'new name the last' is the wordplay.
'name' can be anagrammed to 'AMEN'.
But, I am not clear how this is indicated.
Can you help me to learn more?
(Other definitions for amen that I've seen before include "Word of agreement" , "Response to prayer" , "Approve" , "I agree!" , "Final word in prayer" .)