Crossword Genius

Notary's mark (4)

Ross

I believe the answer is:

seal

'notary's mark' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for seal that I've seen before include "Wax stamp" , "relative of the walrus" , "Amphibious sea animal or kind of stamp" , "Aquatic mammal - close securely" , "marine creature" .)

I've seen this clue in the Universal, the USA Today, The Washington Post, the Newsday and the Newsday.com.
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