Go over European river that's rising
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.
Maybe they are linked in a way I don't understand?
'european river that's rising' is the wordplay.
'european river' becomes 'oder' (I've seen this before).
'that's rising' is a reversal indicator (going up in a down clue).
'oder' written backwards gives 'REDO'.
Can you help me to learn more?
(Other definitions for redo that I've seen before include "Perform (action) again" , "Create again" , "Make anew" , "Redecorate or repeat action" , "Have second thoughts" .)