Refuse to be seen out with Capone (5)
I believe the answer is:
offal
'refuse' is the definition.
(I've seen this before)
'seen out with capone' is the wordplay.
'seen out' becomes 'off' (I've seen this before. I am not sure about the 'seen' bit.).
'with' says to put letters next to each other.
'capone' becomes 'Al' (gangster Al Capone).
'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 "Edible heart, liver and tongue, for instance" , "Trimmings of a butchered animal" , "Edible entrails of animals" , "Internal organs of an animal used as food" , "Liver, lights, etc" .)