Early photograph (13)
I believe the answer is:
daguerreotype
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">early 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 daguerreotype that I've seen before include "Old photo" , "Eye up to regard (anag) - old photograph" , "Shot in past" , "Early form of photograph" .)