Céline -, winner of the 1988 Eurovision Song Contest (4)
I believe the answer is:
dion
'song contest' is the definition.
The definition suggests a singular noun which matches the answer.
'celine winner of the 1988 eurovision' is the wordplay.
I cannot really understand how this works, but
'of' could be 'o' and 'o' is found within the answer.
The remaining letters 'din' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for dion that I've seen is " Singer".)