One form of prefix (3)
I believe the answer is:
neo
'form of prefix' is the definition.
'neo' can be an answer for 'form' (I have seen 'New form ' mean 'neo' so perhaps 'form' could also mean 'neo'). I am unsure of the 'of prefix' bit.
'one' is the wordplay.
'one' can be anagrammed to 'NEO'.
However, I am not clear how this is indicated.
Can you help me to learn more?
(Other definitions for neo that I've seen before include "Prefix meaning new, maybe one" , "Prefix meaning new - try one" , "New (suffix)" , "Prefix donating new" , "Hero of The Matrix films; new (prefix)" .)