Business attracting a lot of interest (5)
I believe the answer is:
'interest' is the definition.
(I know that usury is a interest)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for usury that I've seen before include "Loan sharking" , "Lending money at excessive rates of interest" , "Lending at high interest rates" , "Shylock's calling" , "Lending of money at exorbitant interest" .)