This was presented on NPR's Weekend Edition by Will Shortz. I've been trying for days and have no clue. You can see the puzzle under "Next Week's Challenge" here
The following two word phrases having something very unusual in common. What is it? And when you find it, think of another two word phrase that has the same property.
- Property Rights
- Land Mine
- Sales Order
- Color Scheme
- India Ink
I will be able to verify after the next episode of NPR's Weekend Edition this upcoming Sunday. (September 24th, 2018).