Many times we come up with ideas that is related to multiple product like .com and mobile. It would be awesome if we could associate one feature and /or idea to multiple products using cloning.
As noted in the comments, we currently have the ability to copy a feature.
Another potential workaround is to copy a release into another product. This would allow you to clone multiple features across products.
Based on the workaround, along with community feedback and current priorities, we are unlikely to make updates in this area. We hope you can understand.