Pictures can be seen here since getting developed, enthralling mother (7)
I believe the answer is:
cinemas
'pictures can be seen here' is the definition.
'since getting developed enthralling mother' is the wordplay.
'getting developed' indicates anagramming the letters.
'enthralling' is an insertion indicator.
'mother' becomes 'ma' (ma is a kind of mother).
'since' with letters rearranged gives 'cines'.
'cines' placed around 'ma' is 'CINEMAS'.
(Other definitions for cinemas that I've seen before include "Where films are shown" , "Picture-houses" .)