Bar that is accommodating politician and journalist (6)
I believe the answer is:
impede
'bar' is the definition.
(thesaurus)
'that is accommodating politician and journalist' is the wordplay.
'that is' becomes 'ie' ('i.e.' can be a synonym of 'that is').
'accommodating' means one lot of letters goes inside another.
'politician' becomes 'mp'.
'and' is a charade indicator (letters next to each other).
'journalist' becomes 'ed' (short for editor).
'mp'+'ed'='mped'
'ie' enclosing 'mped' is 'IMPEDE'.
(Other definitions for impede that I've seen before include "Hinder or obstruct, say progress" , "check" , "Stand in the way of progress" , "Cramp" , "Obstruct or thwart" .)