Some of the sung odes are about Helios (3,3)

'helios' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps you can see an association between them that I can't see?

'some of the sung odes are about' is the wordplay.
'some of' becomes 'o'.
'odes are' becomes 'd' (I can't justify this - if you can you should believe this answer much more).
'about' means one lot of letters goes inside another.
'sung'+'d'='sungd'
'o' put within 'sungd' is 'SUN-GOD'.

Can you help me to learn more?