Newspaper's against plugging replica enamelwork (9)
I believe the answer is:
cloisonne
'enamelwork' is the definition.
(I've seen this before)
'newspaper's against plugging replica' is the wordplay.
'newspaper's' becomes 'is' (UK newspaper).
'against' becomes 'on' (I've seen this in other clues).
'plugging' is an insertion indicator (I've seen this in other clues).
'replica' becomes 'clone' (I've seen this before).
'is'+'on'='ison'
'ison' placed inside 'clone' is 'CLOISONNE'.
(Other definitions for cloisonne that I've seen before include "Sort of design" , "Panelled enamelwork" , "Enamel work" , "enamelware" .)