Provide with a new, wonderful part (5)
I believe the answer is:
endow
'provide with' is the definition.
(I've seen this in another clue)
'a new wonderful part' is the wordplay.
'a new' becomes 'endo' (I can't explain this - if you can you should believe this answer much more).
'part' says to take the initial letters.
The initial letter of 'wonderful' is 'w'.
'endo'+'w'='ENDOW'
Can you help me to learn more?
(Other definitions for endow that I've seen before include "Invest" , "Provide with a permanent income - perhaps a college" , "Enrich with a gift or faculty" , "Set up with money" , "Provide money for" .)