In their manor, they known their station (6)
I believe the answer is:
police
'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" .)