Got on with extremely top-notch diver at sea (7)

I believe the answer is:

arrived

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'got' is the definition.
('arrive' can be a synonym of 'get')

'with extremely top-notch diver at sea' is the wordplay.
'with extremely top notch' becomes 'ar' (I can't explain this - if you can you should give a lot more credence to this answer).
'at sea' indicates an anagram.
'diver' with letters rearranged gives 'rived'.
'ar'+'rived'='ARRIVED'

'on' is the link.

Can you help me to learn more?

(Other definitions for arrived that I've seen before include "Reached a destination" , "completed the journey" , "Came" , "A driver (anag.)" .)

I've seen this clue in The Telegraph.

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