Plan one leaving board in a huff announced? (5)
I believe the answer is:
draft
'plan' is the definition.
(I know that draft is a type of plan)
'one leaving board in a huff announced?' is the wordplay.
'one leaving board in a huff' becomes 'draught' (huff can mean to remove a piece in draughts).
'announced?' shows a homophone (sound like).
'draught' is a homophone of 'DRAFT'.
(Other definitions for draft that I've seen before include "Sketch - detachment of men" , "Current of air or preliminary sketch" , "Written plan" , "Sketch; money order" , "conscript" .)