Give final word to lead developer to make change (5)
I believe the answer is:
amend
'change' is the definition.
(I know that amend is a kind of change)
'give final word to lead developer' is the wordplay.
'give' says to put letters next to each other.
'final word' becomes 'amen' (last word in a prayer).
'to lead developer' becomes 'd' (I can't justify this - if you can you should give a lot more credence to this answer).
'amen'+'d' is 'AMEND'.
'to make' is the link.
Can you help me to learn more?
(Other definitions for amend that I've seen before include "Change to improve" , "make an improvement" , "Put right" , "Ameliorate" , "Correct or alter to improve" .)