Reporter snares PM on journey (8)
I believe the answer is:
pressman
'reporter' is the definition.
(thesaurus)
'snares pm on journey' is the wordplay.
'on journey' indicates anagramming the letters (letters journey around).
'snares'+'pm'='snarespm'
'snarespm' anagrammed gives 'PRESSMAN'.
(Other definitions for pressman that I've seen before include "correspondent?" , "Male journalist" .)