Trained genuine young actress
I believe the answer is:
ingenue
'young actress' is the definition.
(I've seen this in another clue)
'trained genuine' is the wordplay.
'trained' is an anagram indicator (to train can mean to grow something into a shape).
'genuine' anagrammed gives 'INGENUE'.
(Other definitions for ingenue that I've seen before include "Artless innocent young girl on stage" , "Innocent young woman in play" , "Naive female" , "Unsophisticated girl" , "Unsophisticated young female" .)