Crossword Genius

The cries of horses? (4)

Ross

I believe the answer is:

bays

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'horses?' is the definition.

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

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(Other definitions for bays that I've seen before include "Indentations of a shoreline" , "Inlets; barks" , "Laurel trees" .)

I've seen this clue in the Evening Standard.
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