Possible Clues:

• Spanish grocery and wine shop
• In Slough, writer returns to a Spanish wine cellar
• Graduate frames poem ultimately praising supplier of wine
• Liquor store fixed up time and date of first delivery?
• Wine supplier recalling age and date of birth
• Span. wine shop
• Chap, for example, with a cellarful of wine for sale
• Shop or cellar in Spain for selling wine
• Old student no longer turning up in wine shop
• Chap backing mature store selling wine