He is said to exemplify happiness (7)

I believe the answer is:

sandboy

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'he is said to exemplify happiness' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.

'he is' is the wordplay.
I cannot really see how this works, but
'he' could be 'boy' and 'boy' is found in the answer.
The remaining letters 'sand' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in The Globe and Mail.

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