Lore complicated job (4)
I believe the answer is:
role
'job' is the definition.
(a job is a role or position)
'lore complicated' is the wordplay.
'complicated' indicates an anagram (a complex or confusing ordering of the letters).
'lore' anagrammed gives 'ROLE'.
(Other definitions for role that I've seen before include "Acting part" , "Duty" , "Character" , "Function; part" , "Impersonation" .)