The 'big house' familiar to the local police (5)

I believe the answer is:

manor

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'the big house' is the definition.
(large home)

I don't understand the rest of the clue.

(Other definitions for manor that I've seen before include "house on estate" , "lord's home" , "Lord's estate" , "Police district (slang)" , "Large country house for Roman" .)

I've seen this clue in the Evening Standard.

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