Fabulous one for Paris Saint-Germain against Madrid side (6)
I believe the answer is:
unreal
'fabulous' is the definition.
(similar in meaning)
'one for paris saint-germain against madrid side' is the wordplay.
I cannot quite understand how this works, but
'one' could be 'un' (northern English dialect form of 'one') and 'un' is located in the answer.
'side' could be 'real' (Real Madrid) and 'real' is present in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for unreal that I've seen before include "Existing only in the imagination, not actual" , "Fanciful" , "Lacking in substance" , "Artificial, insubstantial" , "Illusory, not actual" .)