Go soft and old, somehow (4)
I believe the answer is:
plod
'go' is the definition.
The definition and answer can be both to do with motion as well as being verbs in their base form.
Perhaps you can see a link between them that I can't see?
'soft and old somehow' is the wordplay.
'soft' becomes 'p' (musical abbreviation for piano, 'soft').
'and' is a charade indicator (letters next to each other).
'somehow' indicates anagramming the letters.
'old' with letters rearranged gives 'lod'.
'p'+'lod'='PLOD'
Can you help me to learn more?
(Other definitions for plod that I've seen before include "Heavy walk; PC (slang)" , "bluebottle, say" , "Work (or walk) laboriously" , "Trudge - policeman" , "Noddy's police constable" .)