Crossword Genius

Roughly fight after taking time away from domed building (5,5)

Ross

I believe the answer is:

round about

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

'fight after taking time away from domed building' is the definition.
I know nothing about this answer so I can't judge whether this works.

'roughly' is the wordplay.
I cannot quite see how this works, but
'roughly' could be 'about' (about can mean roughly or approximately) and 'about' is present in the answer.
The remaining letters 'round' is a valid word which might be clued in a way I don't understand.
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 Sydney Morning Herald.
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