Very precise journalist against blocking constable (8)
I believe the answer is:
pedantic
'very precise' is the definition.
I can't judge whether this definition defines the answer.
'journalist against blocking constable' is the wordplay.
'journalist' becomes 'ed' (short for editor).
'against' becomes 'anti' (prefix meaning against).
'blocking' is an insertion indicator (to block can mean to plug a gap in something).
'constable' becomes 'PC' (police constable).
'ed'+'anti'='edanti'
'edanti' put into 'pc' is 'PEDANTIC'.
Can you help me to learn more?
(Other definitions for pedantic that I've seen before include "Adhering strictly to the rules" , "Precise; didactic" , "Excessively concerned with minor details" , "Excessively nit-picking" , "Overly concerned with insignificant detail" .)