In the pictures, a great story (4)
I believe the answer is:
epic
'story' is the definition.
(I have seen 'Heroic story' mean 'epic' so perhaps 'story' could also mean 'epic')
'in the pictures a great' is the wordplay.
'in' indicates a hidden word.
'EPIC' is hidden within 'the pictures great'.
(Other definitions for epic that I've seen before include "Heroic; saga" , "On a grand scale, like heroic poem" , "Long adventure story" , "Long literary work about great events" , "Long poem, book, film" .)