Ignore troubled area (6)
I believe the answer is:
region
'area' is the definition.
(I know that area can be written as region)
'ignore troubled' is the wordplay.
'troubled' indicates an anagram.
'ignore' with letters rearranged gives 'REGION'.
(Other definitions for region that I've seen before include "Area, location" , "Tract or area" , "Wide area" , "Ignore (anag) - area" , "Area, neighbourhood" .)