Crossword Genius

Compelled to take rook for bishop in game (5)

Ross

I believe the answer is:

round

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'game' is the definition.
(round is a kind of game)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for round that I've seen before include "unsuitable for square pegs" , "Set of drinks; song" , "Drinks order" , "A partsong in which voices follow each other" , "Encircling" .)

I've seen this clue in The Hindu.
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