Crossword Genius

Police finally after father who released a bull (4)

Ross

I believe the answer is:

pope

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

'police finally after father who released a bull' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.

'police finally after father' is the wordplay.
'finally' indicates one should take the final letters.
'after' says to put letters next to each other.
'father' becomes 'pop' (pop is a kind of father).
The last letter of 'police' is 'e'.
'e' after 'pop' is 'POPE'.

Can you help me to learn more?

(Other definitions for pope that I've seen before include "Writer" , "church leader in Rome" , "freshwater fish" , "Poet - religious leader" , "author" .)

I've seen this clue in The Guardian.
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