Coins collected for descendant (5)

I believe the answer is:

scion

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

'descendant' is the definition.
(scion is a kind of descendant)

'coins collected' is the wordplay.
'coins' anagrams to 'SCION'.
But, I'm not clear how this is indicated.

'for' acts as a link.

Can you help me to learn more?

(Other definitions for scion that I've seen before include "Young child" , "Descendent - heir" , "Descendant - heir" , "Young twig; descendant" , "Younger member of a family" .)

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