Go with flattery when conversing (10)
I believe the answer is:
complement
'go' is the definition.
The definition and answer can be both related to change as well as being verbs in their base form.
Perhaps there's a link between them I don't understand?
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for complement that I've seen before include "Contingent" , "This number on board" , "all who work on board" , "Companion" , "ship's crew" .)