Possible Clues:

• Drink a lot, taking leak behind back of pub
• Be around where many animals are brought up to drink a lot
• Colloquial word for an alcoholic drink
• Alcoholic beverages (informal)
• Black trickle producing drink
• Drink in a belt
• Alternative to raspberry, with half the flavour in drink
• Still dripping?
• Part of BYOB
• Drink coming in dribble at back of pub