Dogs scoff in revolutionary way (6)
I believe the answer is:
trails
'dogs' is the definition.
('trail' can be a synonym of 'dog')
'scoff in revolutionary way' is the wordplay.
'scoff' becomes 'rail' (I've seen this before).
'in' means one lot of letters goes inside another.
'revolutionary way' becomes 'ts' (I am not sure about this - if you are sure you should believe this answer much more).
'rail' going inside 'ts' is 'TRAILS'.
Can you help me to learn more?
(Other definitions for trails that I've seen before include "Goes after" , "Follows - footpaths in the wild" , "Follows or drags behind" , "Paths or tracks through wild or hilly country" , "Lags behind" .)