Skin colour (4)
I believe the answer is:
buff
This clue is a double definition.
'skin' is the first definition.
(buff is a kind of skin)
'colour' is the second definition.
(buff is a kind of colour)
(Other definitions for buff that I've seen before include "Bare skin - enthusiast" , "Yellowish brown" , "with attractively well-developed muscles" , "Yellowish-beige; expert" , "Adept; yellowish-brown" .)