Cook entertains news boss and European publisher (8)
I believe the answer is:
baedeker
'publisher' is the definition.
'cook entertains news boss and european' is the wordplay.
'cook' becomes 'baker' (type of cook).
'entertains' is an insertion indicator.
'news boss' becomes 'ed' (short for editor).
'and' is a charade indicator (letters next to each other).
'european' becomes 'e' (abbreviation e.g. EU).
'ed'+'e'='ede'
'baker' enclosing 'ede' is 'BAEDEKER'.
(Other definitions for baedeker that I've seen before include "publishing company" , "(German) travel guide" , "Travel guide author" .)