Way a dung-beetle goes around upside-down (4)
I believe the answer is:
road
'way' is the definition.
(road is a kind of way)
'a dung-beetle goes around upside-down' is the wordplay.
'dung-beetle' becomes 'dor' (I've seen this before).
'goes around' means one lot of letters goes inside another.
'upside down' says the letters should be written backwards.
'a' put into 'dor' is 'daor'.
'daor' back-to-front is 'ROAD'.
(Other definitions for road that I've seen before include "Street" , "Route travelled by sea" , "Path" , "motorway?" , "Highway or byway" .)