Crossword Genius

Adopted symbolic character, animal or object (6)

Ross

I believe the answer is:

mascot

(Other definitions for mascot that I've seen before include "Lucky talisman" , "Something considered to bring good luck" , "One is lucky" , "Thing believed to bring good luck to, say, team" , "Bringer of good luck to team, etc" .)

I've seen this clue in The Guardian.
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