Switch round back row (9)
I believe the answer is:
rearrange
'switch' is the definition.
The definition and answer can be both related to change as well as being verbs in their base form.
Perhaps you can see a link between them that I don't see?
'back row' is the wordplay.
'back' becomes 'rear' (something's rear is its back).
'row' becomes 'range' (range can mean a row or chain of things).
'rear'+'range'='REARRANGE'
'round' acts as a link.
Can you help me to learn more?
(Other definitions for rearrange that I've seen before include "Adjust" , "Move to new positions" , "Put new structure" , "Change the position of" , "Change things" .)