Timber reported on the shore (5)

I believe the answer is:

beech

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'shore' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.

I can't explain the rest of the clue.

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(Other definitions for beech that I've seen before include "for mast?" , "Nut-bearing tree" , "Timber tree" , "Wood" , "Type of tree" .)

I've seen this clue in the Sydney Morning Herald.

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