Harass, torment (7)
I believe the answer is:
bedevil
I believe this clue is a double definition.
'harass' is the first definition.
(I know that bedevil is a more specific form of harass)
'torment' is the second definition.
(I know that torment can be written as bedevil)
(Other definitions for bedevil that I've seen before include "Cause difficulties for, like Satan?" , "Vile bed (anag.)" , "Torture" , "torment" , "Afflict" .)