Rich vein of ore (4)

I think it could be either:

Which length description are you looking for?:

6,4

lode

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

This is the entire clue.

(Other definitions for lode that I've seen before include "Rich source" , "Vein of metal in the earth" , "A deposit of ore, say gold" , "Deposit of valuable ore found in surrounding rocks" , "Deposit of valuable ore running through other rocks" .)

I've seen this clue in the Newsday.com, the Newsday and The New York Times.

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