Go over to find communist ring (4)
I believe the answer is:
redo
'go over' is the definition.
The answer and definition can be both related to change as well as being verbs in their base form.
Perhaps you can see an association between them that I don't see?
'communist ring' is the wordplay.
'communist' becomes 'red' (red can informally mean communist).
'ring' becomes 'O' (letter resembling a ring).
'red'+'o'='REDO'
'to find' is the link.
Can you help me to learn more?
(Other definitions for redo that I've seen before include "Have second thoughts" , "Fashion again" , "Carry out again" , "further attempt?" , "Redecorate or repeat action" .)