Came in to change the pictures (6)
I believe the answer is:
cinema
'the pictures' is the definition.
(I've seen this before)
'came in to change' is the wordplay.
'to change' indicates an anagram.
'came'+'in'='camein'
'camein' anagrammed gives 'CINEMA'.
(Other definitions for cinema that I've seen before include "(Building showing) films" , "Movie house" , "Place of entertainment" , "Picture house" , "Filmdom" .)