First batsman in door, perhaps? (6)
I believe the answer is:
opener
This clue is a double definition.
'first batsman' is the first definition.
(cricket term)
'door perhaps?' is the second definition.
(something which can be opened)
'in' acts as a link.
(Other definitions for opener that I've seen before include "First goal in game" , "Batsman; kitchen utensil" , "First batsman in game" , "A key or a bottle top remover" , "Batsman who starts innings" .)