A cop went to resort city on Atlantic (4,4)

I believe the answer is:

cape town

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

'city on atlantic' is the definition.
'Cape Town' can be an answer for 'city' (city in South Africa). I'm unsure of the 'on atlantic' bit.

'a cop went to resort' is the wordplay.
'to resort' indicates anagramming the letters.
'a'+'cop'+'went'='acopwent'
'acopwent' is an anagram of 'CAPE TOWN'.

Can you help me to learn more?

(Other definitions for cape town that I've seen before include "Oldest S Afr. city" , "South African city" , "Port city in South Africa" , "foreign city" , "place in South Africa" .)

I've seen this clue in The Everyman puzzle in The Observer.

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