Does it take off when the lumberman appears? (5,4)

I believe the answer is:

plane tree

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'it take off when the lumberman appears?' is the definition.
The definition suggests a singular noun which matches the answer.

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for plane tree that I've seen before include "growth" , "Common city plant" , "It sheds its bark" , "maple" .)

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