Came in to play movies (6)
I believe the answer is:
cinema
'movies' is the definition.
(I've seen this before)
'came in to play' is the wordplay.
'to play' is an anagram indicator.
'came'+'in'='camein'
'camein' with letters rearranged gives 'CINEMA'.
(Other definitions for cinema that I've seen before include "(Building for) film" , "Films, collectively" , "Film theatre" , "The flicks" , "Motion pictures" .)