Crossword Genius

Leaving for something new (9)

Ross

I believe the answer is:

departure

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'leaving' is the definition.
(I know that leaving can be written as departure)

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

Can you help me to learn more?

(Other definitions for departure that I've seen before include "The act of going away" , "Variation from the expected" , "outbound journey?" , "Not the usual" , "Lucky" .)

I've seen this clue in the Evening Standard.
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