Haunt of drunken bosses (6)
I believe the answer is:
obsess
'haunt' is the definition.
(to haunt can mean to cause an obsession)
'drunken bosses' is the wordplay.
'drunken' indicates an anagram.
'bosses' anagrammed gives 'OBSESS'.
'of' is the link.
(Other definitions for obsess that I've seen before include "Occupy the thoughts persistently" , "Constantly worry (about something)" , "brood" , "Plague" , "Haunt - preoccupy" .)