I'd feel wrong, getting out of line (6)
I believe the answer is:
defile
'out of line' is the definition.
The answer and definition can be both related to change as well as being verbs in their base form.
Perhaps there's an association between them I don't understand?
'i'd feel wrong' is the wordplay.
'wrong' indicates an anagram.
'id'+'feel'='idfeel'
'idfeel' is an anagram of 'DEFILE'.
'getting' acts as a link.
Can you help me to learn more?
(Other definitions for defile that I've seen before include "Fed lie to pollute" , "Corrupt or violate" , "Desecrate" , "Contaminate" , "Pollute, make dirty" .)