Imitative work made of shining glass — German I gathered (8)
I believe the answer is:
pastiche
'imitative work' is the definition.
(I've seen this before)
'shining glass german i gathered' is the wordplay.
'shining glass' becomes 'paste' (glass used to make gems).
'german i' becomes 'ich' (German for 'I').
'gathered' means one lot of letters goes inside another.
'paste' placed around 'ich' is 'PASTICHE'.
'made of' is the link.
(Other definitions for pastiche that I've seen before include "Chap's tie (anag.)" , "Smorgasbord" , "Imitative artistic work" , "Work of mixed styles" , "Imitative artwork" .)