Giving similar roles to a sort of mould (11)

I believe the answer is:

typecasting

I'm a little stuck... Click here to teach me more about this clue!

'giving similar roles' is the definition.
The answer and definition can be both to do with creating things as well as being present participle verbs.
Perhaps they are linked in a way I don't understand?

'sort of mould' is the wordplay.
'sort' becomes 'type' (type is a kind of sort).
'of mould' becomes 'casting' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'type'+'casting'='TYPECASTING'

'to a' is the link.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.