Where chess players meet, heading for drink? (9)
I believe the answer is:
overboard
'heading for drink?' is the definition.
(the drink can mean the sea)
I don't understand the rest of the clue.
(Other definitions for overboard that I've seen before include "Off boat into water" , "Man ??? - he's fallen off the ship" , "Man . . . . . . . . . - launch the lifeboat!" , "Very enthusiastic" , "having made a splash" .)