Crossword Genius

Push to give up Times , after reflection - saving this? (4)

Ross

I believe the answer is:

tree

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But I can't explain it at all! Could you help me understand?

(Other definitions for tree that I've seen before include "Oak, for example" , "Sequoia, for example" , "Large, woody perennial plant" , "Plane perhaps" , "Source of wood" .)

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