New name - the last word in prayer (4)
I believe the answer is:
amen
'last word in prayer' is the definition.
(I've seen this in another clue)
'new name' is the wordplay.
'new' indicates anagramming the letters.
'name' anagrammed gives 'AMEN'.
'the' is the link.
(Other definitions for amen that I've seen before include "Word of agreement" , "Response to prayer" , "Approve" , "I agree!" , "Final word in prayer" .)