Possible Clues:

• Spirit photograph that takes the biscuit?
• Sweet thing right to invest in crooked game?
• Cream-filled gingerbread wafer
• Mark's finally lucky break — it may be handed to him on a plate
• Make bloomer, turning over biscuit
• Type taken with incessant chatter holding tin providing crisp food
• Biscuit variety with flower on its back?
• Amorous partners roll around, which is sweet
• Alcohol-laced cookie
• Mark rejected flower that could appear in 7