Onion's exterior (4)
I believe the answer is:
skin
(Other definitions for skin that I've seen before include "Personal cover?" , "External surface" , "coat" , "Outer layer of a fruit or vegetable" , "What keeps you in" .)
I believe the answer is:
skin
(Other definitions for skin that I've seen before include "Personal cover?" , "External surface" , "coat" , "Outer layer of a fruit or vegetable" , "What keeps you in" .)