What Cinderella became after twelve (8)
I believe the answer is:
teenager
'twelve' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for teenager that I've seen before include "14, perhaps" , "hormonal problem?" , "Generate (anag)" , "Adolescent" , "Old child or young adult?" .)