Pictorial representation (7)
(Other definitions for imagery that I've seen before include "Pictures in general" , "Mental visions" , "something easy to see?" , "I'm gayer (anag)" , "Language that produces pictures in readers' minds" .)
'pictorial representation' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for image that I've seen before include "Representation, picture" , "Public persona" , "Photo or likeness" , "Likeness; statue" , "Visible impression" .)