Film for all to see, introducing current case (4)
I believe the answer is:
etui
'case' is the definition.
(thesaurus)
'film for all to see introducing current' is the wordplay.
'film' becomes 'et'.
'for all to see' becomes 'u' (universal dvd certificate).
'introducing' is a charade indicator (letters next to each other).
'current' becomes 'i' (symbol for electric current).
'et'+'u'+'i'='ETUI'
(Other definitions for etui that I've seen before include "Small needle case e" , "Case containing sharp objects" , "Small French case" , "Tiny ladies' bag" , "Ornamental bag for needles etc." .)