New, inexperienced journalist overwhelmed by two oppressive people (6)
I believe the answer is:
incubi
'oppressive people' is the definition.
(incubi are demons)
'new inexperienced journalist overwhelmed by two' is the wordplay.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'inexperienced journalist' becomes 'cub' (a cub reporter is an inexperienced journalist).
'overwhelmed by' means one lot of letters goes inside another (inserted letters get absorbed or overwhelmed).
'two' becomes 'II' (Roman numerals).
'n'+'cub'='ncub'
'ncub' placed into 'ii' is 'INCUBI'.
(Other definitions for incubi that I've seen before include "Demons of the night" , "nightmares" .)