Transfer fool breaking rule (8)
I believe the answer is:
reassign
'transfer fool breaking rule' is the definition.
'reassign' can be an answer for 'transfer' ('reassign' can be a synonym of 'transfer'). I'm not sure about the 'fool breaking rule' bit.
'transfer fool breaking rule' is the wordplay.
'transfer fool' becomes 'ass' (I can't explain this - if you can you should give a lot more credence to this answer).
'breaking' indicates putting letters inside.
'rule' becomes 'reign' (reign is a kind of rule).
'ass' placed into 'reign' is 'REASSIGN'.
Can you help me to learn more?
(Other definitions for reassign that I've seen before include "Once again select" , "put to further use" , "put in another place" , "Again appoint" , "put in new position" .)