Crossword Genius

In their manor, they known their station (6)

Ross

I believe the answer is:

police

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

'station' is the definition.
(police station is a kind of station)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for police that I've seen before include "Law enforcers" , "Law-and-order force" , "Emergency service" , "Gardai" , "Boys in blue" .)

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