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Vulgar type secures the bar, having offloaded one religious building (9)

Ross

I believe the answer is:

cathedral

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'religious building' is the definition.
(I've seen this before)

I can't explain the rest of the clue.

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(Other definitions for cathedral that I've seen before include "seat of power" , "religious site" , "Large, important church" , "religious building" , "Main church of diocese" .)

I've seen this clue in The Telegraph.
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