Medium for Kehinde Wiley's "President Barack Obama" (3)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
oil
(Other definitions for oil that I've seen before include "Black gold" , "Grease" , "what can be seen on iceberg" , "Greasy liquid" , "Slippery liquid" .)
I believe the answer is:
oil
(Other definitions for oil that I've seen before include "Black gold" , "Grease" , "what can be seen on iceberg" , "Greasy liquid" , "Slippery liquid" .)