Crossword Genius

Rich vein (4)

Ross

I think it could be either:

seam

lode

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

This is the entire clue.

(Other definitions for seam that I've seen before include "Underground layer of mineral" , "Unfasten" , "The line where two edges are stitched together" , "Joint between two edges" , "Stratum (of a mineral)" .)

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