Not in reality the best players? (5,4)
I believe the answer is:
dream team
'not in reality' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.
'best players?' is the wordplay.
'best' becomes 'dream' (I can't explain this - if you can you should believe this answer much more).
'players?' becomes 'team' (sports team).
'dream'+'team'='DREAM TEAM'
'the' acts as a link.
Can you help me to learn more?
(Other definitions for dream team that I've seen before include "Group considered as perfect for a given task" , "An ideal mix of people" , "Ideal combination" , "Perfect combination of people for a task" .)