Can option broadcast fight being loaded? (4,5)

I believe the answer is:

dual flush

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'can option broadcast fight' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'being loaded?' is the wordplay.
'being' becomes 'dual' (I can't explain this - if you can you should give a lot more credence to this answer).
'loaded?' becomes 'flush' (synonyms).
'dual'+'flush'='DUAL FLUSH'

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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