Church area where Jack has to doff his cap (4)

I believe the answer is:

nave

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'church area' is the definition.
(I've seen this in another clue)

I don't understand the rest of the clue.

(Other definitions for nave that I've seen before include "Central place in church" , "Main body of a church" , "Part of a church sounds roguish" , "Part of the church sounds like a rogue" , "Main part of a church" .)

I've seen this clue in The Irish Times.

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