Crossword Genius

Nefarious activities carried out at night? (4,5)

Ross

I believe the answer is:

dark deeds

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'nefarious' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.

'activities carried out at night?' is the wordplay.
I cannot quite see how this works, but
'activities' could be 'deeds' (I've seen this before) and 'deeds' is present in the answer.
'night?' could be 'dark' ('dark' can be a synonym of 'night') and 'dark' is found within the answer.
This accounts for all the letters.
This explanation may well be incorrect...

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I've seen this clue in the Evening Standard.
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