Poor actor in the home counties brings disgrace (5)
I believe the answer is:
shame
'disgrace' is the definition.
('shame' can be a synonym of 'disgrace')
'poor actor in the home counties' is the wordplay.
'poor actor' becomes 'ham' (I've seen this before).
'in the' is an insertion indicator.
'home counties' becomes 'se'.
'ham' put within 'se' is 'SHAME'.
'brings' acts as a link.
(Other definitions for shame that I've seen before include "Ignomony" , "pity!" , "Painful emotion resulting from guilt" , "Disgrace, intense regret" , "show up" .)