Scold or nag (8)
I believe the answer is:
harridan
This clue is a double definition.
'scold' is the first definition.
(I know that harridan is a type of scold)
'nag' is the second definition.
(I know that harridan is a type of nag)
(Other definitions for harridan that I've seen before include "nasty old woman" , "Bossy old woman" , "Battleaxe" , "Nagger" , "awful old woman" .)