Related Clues:

• Piece of the pie?
• Retweet, say
• Serving cut from a larger portion
• Geological layer
• Pizza shop purchase
• Apportion equally
• Pie base
• Proportion of soft centre perhaps?
• Divide the pie
• Market unit
• Hard outer layer
• Ham serving
• Pizza part often eaten last
• Give portion to others
• Hardened layer; pie top