Little beauty that woman found in beastly baby (6)
I believe the answer is:
cherub
'beastly baby' is the definition.
'cherub' can be an answer for 'baby' (I have seen 'Innocent baby ' mean 'cherub' so perhaps 'baby' could also mean 'cherub'). I'm not sure about the 'beastly' bit.
'little beauty that woman found in' is the wordplay.
'little beauty' becomes 'cub' (I can't justify this - if you can you should give a lot more credence to this answer).
'that woman' becomes 'her' (her refers to a woman).
'found in' indicates putting letters inside.
'cub' going around 'her' is 'CHERUB'.
Can you help me to learn more?
(Other definitions for cherub that I've seen before include "sweet infant" , "Angelic child" , "innocent-looking child" , "Little angel" , "A heavenly winged babe" .)