Figure, after 'ditto', to get a duplication (4)
I believe the answer is:
doll
'figure' is the definition.
(thesaurus)
'after ditto to get a duplication' is the wordplay.
'after' says to put letters next to each other.
'ditto' becomes 'do'.
'to get a duplication' becomes 'll' (I can't justify this - if you can you should give a lot more credence to this answer).
'do' next to 'll' is 'DOLL'.
Can you help me to learn more?
(Other definitions for doll that I've seen before include "A girl's plaything" , "Girl's toy" , "Toy replica of a person" , "Toy representing person" , "Small replica of a person" .)