Crossword Genius

It may be stolen on a diamond (4)

Ross

I believe the answer is:

base

'it may be stolen on a diamond' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for base that I've seen before include "Ignoble; low part" , "Interest charged by the Bank of England to commercial banks" , "Shameful - headquarters" , "Found - station - contemptible" , "unprincipled" .)

I've seen this clue in The Washington Post, the L.A. Times Daily and the Universal.
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