Criminal line-up (6,7)
I believe the answer is:
rogues gallery
'criminal line-up' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for rogues gallery that I've seen before include "Collection of photographs of known criminals" , "Criminal line-up" , "Collection of pictures of criminals" , "Group of undesirables" , "Set of criminals' photos" .)