Possible Clues:

• What a bore that that's the whole of it, by the sound of it!
• There's little weight in aluminium — a small bit, perhaps
• It has its point
• Cobbler's standby
• Aid in punching
• Everyone said it's boring
• What's likely to be boring? Everything, reportedly
• What a bore everything sounds!
• Saddler's device
• That's the sound of the start of 13 across and that's the drill