Crossword Genius

Cheat and solve this clue, perhaps (2,4)

Ross

I believe the answer is:

do down

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

'cheat' is the definition.
(I've seen this before)

'and solve this clue perhaps' is the wordplay.
I cannot really understand how this works, but
'and' could be 'n' (common abbreviation for 'and') and 'n' is located in the answer.
'solve' could be 'do' (as in doing a crossword!) and 'do' is found within the answer.
The remaining letters 'dow' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for do down that I've seen before include "Cheat" , "Criticise" , "Informally, get the better of or swindle" .)

I've seen this clue in The Telegraph.
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