A bad actor to ring over in Nebraska (5)
I believe the answer is:
omaha
'in nebraska' is the definition.
('Omaha' is part of 'nebraska')
'a bad actor to ring over' is the wordplay.
'bad actor' becomes 'ham' (a ham is someone who overacts).
'to ring' becomes 'O' (letter resembling a ring).
'over' shows that the letters should be reversed in order.
'a'+'ham'+'o'='ahamo'
'ahamo' in reverse letter order is 'OMAHA'.
(Other definitions for omaha that I've seen before include "State [CITY!!!]" , "American-Indians" , "Nebraska's largest city" , "American town" , "Largest city in Nebraska" .)