Fight arranged? Don't give up! (6,2)

I believe the answer is:

battle on

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'fight arranged? don't give up' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.

'fight arranged? don't give up' is the wordplay.
'fight' becomes 'battle' (synonyms).
'arranged? don't give' becomes 'no' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'up' shows that the letters should be reversed in order (in down clue: letters go upwards).
'no' reversed gives 'on'.
'battle'+'on'='BATTLE ON'

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I've seen this clue in The Sun.

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