It means business (8)
I believe the answer is:
commerce
This clue might be a double definition.
'it' is the first definition.
The definition suggests a singular noun which matches the answer.
'business' is the second definition.
(I've seen this before)
'means' acts as a link.
Can you help me to learn more?
(Other definitions for commerce that I've seen before include "The buying and selling of commodities and services" , "Sales and purchases of goods and services" , "Business dealings" , "Traffic" , "Trading exchanges" .)