North of Kent port, letters he has passed across (6,4)

I believe the answer is:

handed over

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'north of kent port letters he' is the definition.
The definition suggests a singular noun but the answer is not.

'passed across' is the wordplay.
'passed' becomes 'handed' ('hand' can be a synonym of 'pass').
'across' becomes 'over' (synonyms).
'handed'+'over'='HANDED OVER'

'has' is the link.

Can you help me to learn more?

(Other definitions for handed over that I've seen before include "Betrayed" , "Passed" , "Transferred" .)

I've seen this clue in The Guardian.

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