Criminal line-up (6,7)
I believe the answer is:
rogues gallery
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">criminal line-up</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(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" .)