Crossword Genius

Mock a doer of good deeds (5)

Ross

I believe the answer is:

scout

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

'mock' is the definition.
(thesaurus)

'a doer of good deeds' is the wordplay.
I cannot quite see how this works, but
'of' could be 'o' and 'o' is found in the answer.
The remaining letters 'scut' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for scout that I've seen before include "Person sent out to gain information" , "Member of a youth movement" , "Soldier on a reconnaissance mission" , "Reconnoitre" , "Explore" .)

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