Cuttlefish (5)
I believe the answer is:
sepia
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cuttlefish</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 sepia that I've seen before include "Brown of old photos" , "Reddish brown -- ie sap (anag)" , "Brown tint" , "Pigment obtained from cuttlefish ink" , "Old drawing" .)