Directors twiddling thumbs, reportedly? (5)

I believe the answer is:

board

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'directors' is the definition.
(board of directors)

I can't explain the remainder of the clue.

(Other definitions for board that I've seen before include "Collection of directors" , "panel" , "See 9" , "Live in lodgings" , "Food - table - directors" .)

I've seen this clue in The Telegraph.

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