Possible Clues:

• Destination for a filling!
• A hollow within a solid, say tooth
• Hole that can be the source of pain
• Hollow (in tooth)
• Birmingham maybe securing a victory, initially hollow
• Hole as in tooth
• A five in the whole (by the sound of it) of the town
• Hole where rodent has it buried
• Exactly what's needed in rodent's hole
• This hole has a guinea-pig sitting outside it