Crossword Genius

Because of tedious play, is leaving (3,2)

Ross

I believe the answer is:

due to

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'because of' is the definition.
(I've seen this in another clue)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Another definition for due to that I've seen is " Caused by".)

I've seen this clue in The Guardian.
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