Outer surface (7)
I believe the answer is:
outside
(Other definitions for outside that I've seen before include "External surface" , "Unlikely" , "Exterior" , "Alfresco" , "Not indoors" .)
I believe the answer is:
outside
(Other definitions for outside that I've seen before include "External surface" , "Unlikely" , "Exterior" , "Alfresco" , "Not indoors" .)