See aggressive male do good -- man of courage? (7)
I believe the answer is:
bulldog
'man of courage?' is the definition.
'see aggressive male do good' is the wordplay.
'see aggressive male' becomes 'bull' (I am not sure about this - if you are sure you should believe this answer much more).
'good' becomes 'g' (abbreviation).
'bull'+'do'+'g'='BULLDOG'
Can you help me to learn more?
(Other definitions for bulldog that I've seen before include "Person of obstinate courage" , "Drummond so called" , "Canine breed noted for courage" , "Sturdy animal" , "Sturdy pet; type of clip" .)