Most of beaten path (5)
I believe the answer is:
route
'path' is the definition.
(I know that path can be written as route)
'most of beaten' is the wordplay.
'most of' means to remove the last letter.
'beaten' becomes 'routed' (routing is a kind of beating).
'routed' with its final letter removed is 'ROUTE'.
(Other definitions for route that I've seen before include "Way of getting from A to B" , "Established line of trave" , "Course, path" , "Path taken" , "Direction taken" .)