Crossword Genius

Rome's bishopric hears perforated ocean (4,3)

Ross

I believe the answer is:

holy see

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

'rome's' is the definition.
(I've seen this before)

'bishopric hears perforated ocean' is the wordplay.
I cannot quite see how this works, but
'bishopric' could be 'see' (I've seen this before) and 'see' is located in the answer.
The remaining letters 'holy' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for holy see that I've seen before include "Church court" , "Central administration of the Roman Catholic religion" , "Rome ecclesiastically" , "Diocese of Rome" , "place where RC governs" .)

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