European city from Barking station, northbound (7)

I believe the answer is:

potsdam

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'european city' is the definition.
'potsdam' can be an answer for 'city' (I have seen 'German city' mean 'potsdam' so perhaps 'city' could also mean 'potsdam'). I'm not certain of the 'european' bit.

'barking station northbound' is the wordplay.
'barking' becomes 'mad' (barking mad).
'station' becomes 'stop' (I've seen this in another clue).
'northbound' says the letters should be written backwards.
'mad'+'stop'='madstop'
'madstop' backwards is 'POTSDAM'.

'from' acts as a link.

Can you help me to learn more?

(Other definitions for potsdam that I've seen before include "conference centre" , "conference city" , "Brandenburg capital" , "WW two 1945 conference; stop mad (anag.)" , "Site of WW2 conference" .)

I've seen this clue in The Times.

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