Filmdom (6)
I believe the answer is:
cinema
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">filmdom</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for cinema that I've seen before include "Film theatre" , "Where films are shown" , "The big screen" , "Picture-house 96)" , "Movie-house" .)