Old photo tint (5)
I believe the answer is:
sepia
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">old photo tint</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for sepia that I've seen before include "Reddish brown -- ie sap (anag)" , "Colourant" , "Colour from cuttlefish ink" , "Brown tone associated with old photographs" , "Denizen of deep" .)