Obscure East European importing magazines (7)
I believe the answer is:
eclipse
'obscure' is the definition.
(eclipsing is a kind of obscuring)
'east european importing magazines' is the wordplay.
'east' becomes 'e' ('E' can be a synonym of 'east').
'european' becomes 'e' (abbreviation e.g. EU).
'importing' indicates putting letters inside.
'magazines' becomes 'clips' ('clip' can be a synonym of 'magazine').
'e'+'e'='ee'
'ee' going around 'clips' is 'ECLIPSE'.
(Other definitions for eclipse that I've seen before include "concealment" , "The obscuring of one celestial body by another" , "dark?" , "Outshine, throw into obscurity" , "Obscure light from (other celestial body)" .)