Crossword Genius

One wearing a "horsy" helmet (6)

Ross

I believe the answer is:

bronco

(Other definitions for bronco that I've seen before include "Lively horse" , "Wild horse of W. US" , "An unbroken mustang, bucking perhaps" , "Untamed mustang" , "Wild bucking horse" .)

I've seen this clue in the Newsday.
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