Crossword Genius

Fish carry out nothing in the mire (6,3)

Ross

I believe the answer is:

murray cod

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'fish' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'carry out nothing in the mire' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'nothing' becomes 'O' (looks like zero - 0).
'in' means one lot of letters goes inside another.
'the mire' becomes 'mud' (I've seen this before).
'carry' anagrammed gives 'rrayc'.
'rrayc'+'o'='rrayco'
'rrayco' going inside 'mud' is 'MURRAY COD'.

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