Crossword Genius

Dominate a match in which one appears to be falling apart (6-2)

Ross

I believe the answer is:

beaten-up

I'm a little stuck... Click here to teach me more about this clue!

'apart' is the definition.
Both the definition and answer are adjectives. Maybe there's a link between them I don't understand?

'dominate a match in which one appears to be falling' is the wordplay.
I cannot quite see how this works, but
'a' is within the answer.
'be' is found in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

I've seen this clue in The Sunday Times.
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