After treatment Alice is a new woman (5)
I believe the answer is:
celia
'new woman' is the definition.
'Celia' can be an answer for 'woman'. I am unsure of the 'new' bit.
'after treatment alice' is the wordplay.
'after treatment' indicates an anagram (letters treated or processed in a new way).
'alice' anagrammed gives 'CELIA'.
'is a' is the link.
Can you help me to learn more?
(Other definitions for celia that I've seen before include "lady" , "Daughter to Frederick" , "Character in Tales from Shakespeare" , "Rosalind's cousin" , "Frederick's daughter" .)