Crossword Genius

Yellowish mass extracted from molten chrome (5)

Ross

I believe the answer is:

ochre

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'yellowish' is the definition.
(I've seen this in another clue)

I don't understand how the remainder of the clue works.

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(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" .)

I've seen this clue in The Times.
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