Character, grown-up, getting new start (6)

I believe the answer is:
nature
'start' is the definition.
The definition and answer can be both human attributes as well as being singular nouns.
Maybe there's an association between them I don't understand?
'character grown-up getting new' is the wordplay.
'character' becomes 'a'.
'grown-up' becomes 'ture' (I am not sure about this - if you are sure you should believe this answer much more).
'getting' means one lot of letters go next to another.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'a'+'ture'='ature'
'ature' after 'n' is 'NATURE'.
Can you help me to learn more?
(Other definitions for nature that I've seen before include "Tea urn (anag)" , "Mother Earth" , "scientific journal" , "Kind - disposition" , "Character - our Mother" .)
