Possible Clues:

• Is it pear squash, if it's a drink?
• A drink before a meal
• Dry Champagne, e.g.
• Wild parties mostly providing stimulating drink
• A drink before dinner
• A salesman returns it whenever getting a drink
• Might this get a start of 1 across and fit up for a starter?
• Pre-nosh tipple?
• Suitable anger with which father sent back the drink
• Alcoholic appetizer