Move clumsily or woodenly (6)

I believe the answer is:

lumber

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'move clumsily' is the definition.
(I've seen this in another clue)

I can't explain the remainder of the clue.

(Other definitions for lumber that I've seen before include "Jumble" , "articles in storage" , "Move awkwardly; useless things" , "Move in a heavy way, with partly treated wood" , "Dressed timber" .)

I've seen this clue in the Evening Standard.

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