Crossword Genius

Castle chess piece (4)

Ross

I believe the answer is:

rook

(Other definitions for rook that I've seen before include "Swindle (colloq.); bird" , "Defraud; bird; chessman" , "Gregarious crow" , "Chess piece or crow" , "Defraud -- crow" .)

I've seen this clue in The Sun.
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