Without assistance from Napoleon! (4)
I believe the answer is:
solo
This clue might be a double definition.
'without assistance' is the first definition.
(I've seen this in another clue)
'napoleon' is the second definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'from' acts as a link.
Can you help me to learn more?
(Other definitions for solo that I've seen before include "On one's own, unaccompanied" , "Unaccompanied passage" , "Go it alone" , "Alone, unaccompanied" , "Game for four" .)