a money-spinner

a money-spinner

  (British & Australian)
a business or product that makes a lot of money for someone Cookery books are becoming a real money-spinner for the publishing industry.
References in periodicals archive ?
Summary: Youth in Kolkata have taken to cyber gaming in a big way as it is fast emerging as a money-spinner and a lucrative career option.
Kolkata, February 27 (ANI): Youth in Kolkata have taken to cyber gaming in a big way as it is fast emerging as a money-spinner and a lucrative career option.