Excesses to which the middleman would never go (8)
I believe the answer is:
extremes
'excesses' is the definition.
The answer and definition can be both human attributes as well as being plural nouns.
Perhaps they are linked in a way I don't understand?
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for extremes that I've seen before include "They are said to meet" , "Go to ........ to take drastic action" , "End of range items" , "Fanatics go to these" , "Go to . . . . . . . ., great lengths in actions or views" .)