Swapped coins with duke (7)

I believe the answer is:

changed

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'swapped' is the definition.
The answer and definition can be both to do with ownership as well as being past participle verbs.
Perhaps you can see an association between them that I don't see?

'coins with duke' is the wordplay.
'coins' becomes 'change' (I've seen this before).
'with' says to put letters next to each other.
'duke' becomes 'd' (abbreviation).
'change'+'d'='CHANGED'

Can you help me to learn more?

(Other definitions for changed that I've seen before include "Different" , "Turned" , "Modified" , "Altered - substituted" .)

I've seen this clue in The Sun.

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