Cast tries to follow stages in Cinderella's family role (10)
I believe the answer is:
stepsister
'cinderella's family role' is the definition.
I can't judge whether this defines the answer.
'cast tries to follow stages' is the wordplay.
'cast' indicates anagramming the letters (letters are dispersed or cast around).
'to follow' says to put letters next to each other (some letters go after or follow others).
'stages' becomes 'steps' (both can mean parts of a process).
'tries' anagrammed gives 'ister'.
'ister' put after 'steps' is 'STEPSISTER'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for stepsister that I've seen before include "one who hated Cinderella" , "member of the family" , "relative in law" , "Relation gained through a second marriage" .)