Crossword Genius

Four-legged race! (5)

Ross

I believe the answer is:

relay

I'm a little stuck... Click here to teach me more about this clue!

'race' is the definition.
(relay race)

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

Can you help me to learn more?

(Other definitions for relay that I've seen before include "Team of workers" , "track event" , "Receive and pass on - race" , "article in bank" , "supplementary store of anything" .)

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