Feature of the inner planets
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
crust
(Other definitions for crust that I've seen before include "Hard exterior" , "Earth's outer layer" , "Hard outer layer" , "Pie topping" , "Hard outer coating" .)
I believe the answer is:
crust
(Other definitions for crust that I've seen before include "Hard exterior" , "Earth's outer layer" , "Hard outer layer" , "Pie topping" , "Hard outer coating" .)