Grey mineral that is the chief source of lead (6)

I believe the answer is:

galena

(Other definitions for galena that I've seen before include "Angela (anag) - ore producing lead" , "Len, GAA produces lead sulphide" , "Commonest ore of lead - Angle "A" (anag)" , "Lead sulphide mineral" .)

I've seen this clue in The Independent.

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