Accumulating space for public notices (8)

I believe the answer is:

hoarding

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'accumulating' is the definition.
('hoard' can be a synonym of 'accumulate')

I don't understand the rest of the clue.

(Other definitions for hoarding that I've seen before include "Accumulating" , "screen of boards" , "Poster board" , "Collecting and keeping - large board for advertising" , "Board for ads" .)

I've seen this clue in The Times.

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