Shylock (6)
I believe the answer is:
usurer
'shylock' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for usurer that I've seen before include "Extortionate lender of money" , "Unscrupulous moneylender" , "One takes interest" , "One who charges excessive interest" , "Moneylender who charges exorbitant rates" .)