Old-timey photo color (5)
I believe the answer is:
sepia
'old-timey photo color' 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 colour of old photo" , "source of ink" , "Colourant" , "Rich reddish-brown colour" , "Dark reddish-brown pigment" .)