Don't get angry; just leave without a blow (6)
I believe the answer is:
becalm
'blow' 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?
'don't get angry just leave without a' is the wordplay.
I cannot really understand how this works, but
'get' could be 'be' ('get' can mean 'come to be') and 'be' is present in the answer.
'a' is within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for becalm that I've seen before include "Keep motionless by lack of wind" , "don't get the wind up" , "Render motionless from lack of wind" , "Leave a sailing vessel unable to move for lack of wind" , "Make still (from lack of wind)" .)