Photo tint (5)
I believe the answer is:
sepia
'photo tint' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for sepia that I've seen before include "Brown of old photos" , "Brown with a red tinge" , "Pigment got from cuttlefish ink" , "Pigment obtained from cuttlefish ink" , "Denizen of deep" .)