Crossword Genius

Group of players without a match? (5,4)

Ross

I believe the answer is:

dream team

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'without a match?' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'group of players' is the wordplay.
'group of' 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'

Can you help me to learn more?

(Other definitions for dream team that I've seen before include "An ideal mix of people" , "Ideal combination" , "Group considered as perfect for a given task" , "Perfect combination of people for a task" .)

I've seen this clue in The Times.
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