Haunt wicked bosses? (6)
I believe the answer is:
obsess
'haunt' is the definition.
(to haunt can mean to cause an obsession)
'wicked bosses?' is the wordplay.
'wicked' indicates anagramming the letters.
'bosses' is an anagram of 'OBSESS'.
(Other definitions for obsess that I've seen before include "Be constantly preoccupied" , "Be constantly talking about" , "Haunt - preoccupy" , "Persistently preoccupy" , "Preoccupy continually" .)