Crossword Genius

Before going out to do wrong, be destructive (5)

Ross

I believe the answer is:

erode

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

'do wrong be destructive' is the definition.
I can't tell whether this defines the answer.

'before going out' is the wordplay.
'before' becomes 'e' (I've seen this in other clues).
'going out' becomes 'rode' (I can't explain this - if you can you should give a lot more credence to this answer).
'e'+'rode'='ERODE'

'to' is the link.

Can you help me to learn more?

(Other definitions for erode that I've seen before include "Eat away" , "Gradually wear away" , "Become ground down or deteriorate" , "Corrode" , "Abrade" .)

I've seen this clue in the Evening Standard.
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