Very partially open (4)
I believe the answer is:
ajar
(Other definitions for ajar that I've seen before include "It's nearly open" , "not slammed shut" , "Mourn" , "Half-open" , "Half open" .)
I believe the answer is:
ajar
(Other definitions for ajar that I've seen before include "It's nearly open" , "not slammed shut" , "Mourn" , "Half-open" , "Half open" .)