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Evidence of loving humour radiating from one's eyes (8,5)

Ross

I believe the answer is:

laughter lines

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

'one's eyes' is the definition.
The definition suggests a plural noun which matches the answer.

'evidence of loving humour radiating from' is the wordplay.
I cannot really understand how this works, but
'humour' could be 'laugh' (laugh is a kind of humour) and 'laugh' is present in the answer.
'from' could be 'in' (I've seen this in other clues) and 'in' is found within the answer.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in The Irish Times.
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