Name the French friend Ned's upset about (6)
I believe the answer is:
damien
'name the french' is the definition.
The definition suggests a singular noun which matches the answer.
'friend ned's upset about' is the wordplay.
'friend' becomes 'ami' (I've seen this before).
'upset' says the letters should be written backwards.
'about' indicates putting letters inside.
'ned' reversed gives 'den'.
'ami' going into 'den' is 'DAMIEN'.
Can you help me to learn more?
(Other definitions for damien that I've seen before include "Chap" , "and 10: Famous 'Shark' artist" .)