Inch towards border, with upper hand (4)
I believe the answer is:
edge
This clue could be a double definition.
'inch' is the first definition.
(I know that inch can be written as edge)
'upper hand' is the second definition.
(I've seen this in another clue)
'towards border with' is the link.
This may not be correct. Some or all of it may belong to one of the definitions.
Can you help me to learn more?
(Other definitions for edge that I've seen before include "incisiveness" , "Advantage (informal)" , "Create borders" , "Rim or sharp side of knife" , "Cutting side as of knife, or margin" .)