Incline; thin (4)
I believe the answer is:
lean
I believe this is a double definition.
'incline' is the first definition.
(I know that incline can be written as lean)
'thin' is the second definition.
(I know that thin can be written as lean)
(Other definitions for lean that I've seen before include "Incline to prop against" , "David ..., director of Ryan's Daughter" , "What Jack Sprat's wife couldn't eat" , "Unprofitable" , "skinny" .)