Yellowish mass extracted from molten chrome (5)
I believe the answer is:
ochre
'yellowish' is the definition.
(I've seen this in another clue)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for ochre that I've seen before include "Golden pigment" , "Yellow-red earthy pigment" , "Yellow-orange hue" , "Earth coloured pigment" , "Yellow-red mineral from iron oxide used as pigment" .)