Related Clues:

• It may be found above the mantle
• Top of a pie
• Hard exterior
• Role taken on by another informant leader hides
• Outermost part of the Earth and pizza
• Layer beneath the earth's crust
• Hard bit of bread
• Layer between the crust and the core
• Role for chap is to hold empty net
• Flaky quiche part
• Hall of Famer known as "The Mick"
• It may be cut off a sandwich
• Lament (anag) – responsibility