Possible Clues:

• Animal and a collection of teeth found in burial site
• Pet and a ferret around in a resting place
• Underground burial-place
• Twisty underground passageway
• ... towards a curry, perhaps, after Charlie's underground excavation
• Cruise perhaps in carriage, carrying Bill to see burial site
• At beginning constable attending a search in underground area
• Underground passage
• Turkey's peak linked to, say, Persian area tunnel
• Whip a ferret through underground passage