Metal sources (4)

I believe the answer is:

ores

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

This is all the clue.

(Other definitions for ores that I've seen before include "Bauxite, haematite etc" , "Rocks or minerals containing metals" , "Mineral deposits" , "Sources of metal" , "Metal-bearing minerals" .)

I've seen this clue in the Newsday, the King Feature Syndicate and The Wall Street Journal.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.