Goes without saying (8)
I believe the answer is:
absconds
'goes' is the definition.
The definition and answer can be both to do with motion as well as being verbs in their -s form.
Perhaps you can see an association between them that I don't see?
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for absconds that I've seen before include "Bolts, runs away" , "Decamps" , "Does a bunk" , "Flees, runs away" , "Flees to escape from a legal process" .)