Crossword Genius

Swapped coins with old penny (7)

Ross

I believe the answer is:

changed

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

'swapped' is the definition.
The answer and definition can be both to do with ownership as well as being past participle verbs.
Maybe there's a link between them I don't understand?

'coins with old penny' is the wordplay.
'coins' becomes 'change' (change can mean coins).
'with' says to put letters next to each other.
'old penny' becomes 'd' (pre-decimal abbreviation for penny).
'change'+'d'='CHANGED'

Can you help me to learn more?

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

I've seen this clue in The Mirror.
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