Medical photograph (1-3)
I believe the answer is:
x-ray
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">medical photograph</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for x-ray that I've seen before include "Radiation photograph" , "Medical image?" , "Internal "photo"" , "Radiogram" , "Hospital image" .)