Current piece on board (7)
I believe the answer is:
draught
I believe this is a double definition.
'current' is the first definition.
(a draught is a current of air)
'piece on board' is the second definition.
(piece on a draughts board)
(Other definitions for draught that I've seen before include "man that may be crowned" , "unwelcome arrival under the door?" , "It may be drunk" , "Unwelcome blow" , "Current - drink - drawing - checker" .)