Progress edgily (5)
I believe the answer is:
sidle
'progress' is the definition.
The definition and answer can be both to do with motion as well as being verbs in their base form.
Perhaps they are linked in a way I don't understand?
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for sidle that I've seen before include "Move along sideways" , "'Move sideways, furtively perhaps (5)'" , "Edge along furtively" , "Inch along" , "Move like a crab" .)