Crossword Genius

Eject Jack from tournament (4)

Ross

I believe the answer is:

oust

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

'eject' is the definition.
(I've seen this before)

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

Can you help me to learn more?

(Other definitions for oust that I've seen before include "Force out; supplant" , "Remove and replace" , "Get rid of" , "Expel - eject" , "Expel (from a place)" .)

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