Crossword Genius

Elephant ancestor (8)

Ross

I believe the answer is:

mastodon

'elephant ancestor' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for mastodon that I've seen before include "giant from the past" , "Extinct elephant-like mammal" , "Large mammal" , "Prehistoric creature" , "Extinct elephant ancestor" .)

I've seen this clue in The Sun and The Wall Street Journal.
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