Eternal suffering! (7)
I believe the answer is:
abiding
I believe this is a double definition.
'eternal' is the first definition.
'suffering' is the second definition.
('abide' can be a synonym of 'suffer')
(Other definitions for abiding that I've seen before include "bearing" , "With a lasting quality" , "Stopping" , "Putting up with: long-lasting" , "Permanent" .)