Possible Clues:

• Pointy leatherworking tool
• Book-binding tool
• Everyone said it's meant to be boring
• 'So boring for the whole of it, by the sound of it (3)'
• Such a boring thing, everyone said
• Reportedly the totality of leather-workers use it
• Tool for making 48-Across
• For listeners, everything a boring person needs
• Hole-punching device
• Leatherworker's puncher