Cold, like a man on board? (8)
I believe the answer is:
draughty
I believe this clue is a double definition.
'cold' is the first definition.
(a draught makes you cold)
'like a man on board?' is the second definition.
(like a draught in the board game draughts)
(Other definitions for draughty that I've seen before include "like a beer, > cold?" , "letting in current?" , "Cold and windy" , "breezy" , "Letting the wind in" .)