Sister's taken in by advisor or ally (7)
I believe the answer is:
sororal
'sister's' is the definition.
Both the answer and definition are adjectives. Perhaps they are linked in a way I don't understand?
'in by advisor or ally' is the wordplay.
'in' indicates a hidden word.
'SORORAL' can be found hidden inside 'by advisor or ally'.
'taken' is the link.
Can you help me to learn more?
(Other definitions for sororal that I've seen before include "about female siblings" , "Like one of the family" , "Like sisters" , "Sisterly" .)