Evidence of excess in big business? (11)
I believe the answer is:
corporation
'business?' is the definition.
(corporation is a kind of business)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for corporation that I've seen before include "Large company" , "Stomach" , "Big firm" , "City body; paunch" , "target of 17, 8 [CHANCELLORS STATEMENT[" .)