Like something new into which one can change (3)
I believe the answer is:
neo
'like something new into' is the definition.
I can't tell whether this definition defines the answer.
'one can change' is the wordplay.
'can change' indicates anagramming the letters.
'one' with letters rearranged gives 'NEO'.
'which' acts as a link.
Can you help me to learn more?
(Other definitions for neo that I've seen before include "Prefix meaning new or recent" , "Prefix meaning new - try one" , "language" , "Prefix donating new" , "New (suffix)" .)