Yellow pigment (5)
I believe the answer is:
ochre
'yellow pigment' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ochre that I've seen before include "Yellow-red mineral from iron oxide used as pigment" , "Earth used in pigments" , "Earth-coloured pigment" , "Pale brownish-yellow colour or pigment" , "Yellow-orange hue" .)