Elder perhaps calls for age to be shown there (4,5)

I believe the answer is:

tree rings

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'age to be shown there' is the definition.
I know nothing about this answer so I can't judge whether this works.

'elder perhaps calls' is the wordplay.
'elder perhaps' becomes 'tree' (elder is a kind of tree).
'calls' becomes 'rings' ('ring' can be a synonym of 'call').
'tree'+'rings'='TREE RINGS'

'for' acts as a link.

Can you help me to learn more?

I've seen this clue in The Irish Times.

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