Possible Clues:

• Carpenter's tool for shaping wood
• Wood-shaping tool
• Carving tool
• Not a straight tool?
• Central heating I sell mainly to cheat
• May the carp enter to cut with it
• It can be cold in the workshop
• Man's locked in prison room, not entirely chipper
• Eg, woodworking tool
• Sharp tool is carried by guerrilla fighter, one still learning