Photographic cameo superimposed on to another print (5)
I believe the answer is:
inset
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">photographic cameo superimposed on to another print</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 inset that I've seen before include "Picture placed within another" , "Inserted illustration" , "Something put into something else" , "Small picture placed within a larger one" , "day for teachers" .)