A proposed cluster housing development on land formerly belonging to Barberry Hill Farm will help save the working farm, according to the developer and farm owner Kingsley Goddard. Some 5.8 acres, the rear portion of the 17.5-acre farm, was sold last November for $2.4 million to developer Adam Greenberg, who most recently completed the upscale The General’s Residences at Fence Creek in downtown Madison. The working farm was a major selling point for Greenberg and he said he believes it will make it uniquely attractive to homebuyers. The official name of the project is Barberry 12 LLC and Greenberg is partnering with John Gianotti of Waterside Building and Development, who is the builder. The plan is set to go before the Inland Wetlands Commission in the next month or so.