Possible Clues:

• The Scot is unable to pay for, but can monkey with, the snack
• Appetite whetter
• From tin, take mushy pea cocktail treat
• Party food is served up out of saucepan actually
• Small savoury on toast or bread
• Fancy party appetizer
• Cater-waiter's delivery, perhaps
• Sofa would allow one to have a sleep in church!
• Is allowed to copy a cocktail delicacy
• Is a primate able to make a snack?