Introduced resident needing surgery (8)

I believe the answer is:

inserted

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

'introduced' is the definition.
('insert' can be a synonym of 'introduce')

'resident needing surgery' is the wordplay.
'resident' anagrams to 'INSERTED'.
Though, I am unsure how this is indicated.

Can you help me to learn more?

(Other definitions for inserted that I've seen before include "taken out? The opposite" , "Put in" , "Introduced" .)

I've seen this clue in The Guardian.

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