Edged (6)
'edged' is the definition.
('inch' can be a synonym of 'edge')
This is the entire clue.
(Other definitions for inched that I've seen before include "Moved along very slowly" , "Moved by slow degrees" , "Moved gradually" , "Moved in small increments" .)
(Other definitions for sidled that I've seen before include "Moved sideways" , "Moved in furtive or cringing manner" , "Edged, moved furtively" , "Moved in furtive manner, edged along" , "Walked sideways like crab" .)