Crossword Genius

Opprobrious thing to do (3)

Ross

I believe the answer is:

rob

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

'do' is the definition.
Although both the answer and definition are verbs in their base form, I cannot understand how one could define the other.

'opprobrious thing' is the wordplay.
'ROB' is hidden within the letters.
However, I am not sure how this is indicated.

'to' acts as a link.

Can you help me to learn more?

(Other definitions for rob that I've seen before include "Unlawfully take property from (someone)" , "Nick" , "Thieve" , "Burgle" , "shortened form of man's name" .)

I've seen this clue in the Evening Standard.
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