Changing address may be generating strong feelings (6)
I believe the answer is:
moving
This might be a double definition.
'changing address' is the first definition.
'moving' can be an answer for 'changing' (moving is a kind of changing). I am not certain of the 'address' bit.
'be generating strong feelings' is the second definition.
(move can mean to stir emotionally)
'may' is the link.
Can you help me to learn more?
(Other definitions for moving that I've seen before include "causing emotion" , "Affecting" , "Emotional" , "Mobile" , "Arousing strong emotion" .)