Overscrupulous journalist with worker in picture (8)
I believe the answer is:
pedantic
'overscrupulous' is the definition.
(thesaurus)
'journalist with worker in picture' is the wordplay.
'journalist' becomes 'ed' (short for editor).
'with' is a charade indicator (letters next to each other).
'worker' becomes 'ant' (worker is a type of ant).
'in' indicates putting letters inside.
'picture' becomes 'pic' (short for picture).
'ed'+'ant'='edant'
'edant' put into 'pic' is 'PEDANTIC'.
(Other definitions for pedantic that I've seen before include "Excessively nit-picking" , "Fussy over detail" , "Excessively concerned with minor detail" , "Overly concerned with insignificant detail" , "Over-concerned with minor details" .)