Refuse to be put out of operation by Capone (5)
I believe the answer is:
offal
'refuse' is the definition.
(I've seen this before)
'put out of operation by capone' is the wordplay.
'put' is an insertion indicator.
'out of operation' becomes 'f' (I can't justify this - if you can you should give a lot more credence to this answer).
'by' becomes 'of'.
'capone' becomes 'Al' (gangster Al Capone).
'f' going into 'of' is 'off'.
'off'+'al'='OFFAL'
'to be' is the link.
Can you help me to learn more?
(Other definitions for offal that I've seen before include "Meat product" , "Liver or tongue, for example" , "Worthless parts of animal carcass" , "Inner organs used for food" , "Entrails used as food" .)