Oleander obtained from nymph after party with Greek character (11)

'oleander obtained' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'nymph after party with greek character' is the wordplay.
I cannot really see how this works, but
'nymph' could be 'daphne' (Daphne is an example) and 'daphne' is present in the answer.
'party' could be 'do' (do can informally mean a party) and 'do' is found within the answer.
'character' could be 'rho' (rho is a kind of letter of the alphabet) and 'rho' is located in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).

'from' is the link.

Can you help me to learn more?