Related Clues:

• It's used for opening act in theatre
• Places left in a mess by surgical instrument
• Engraver's instrument
• One cuts bit of loaf well, but not the ends
• Engraver's needle
• Theatrical knife?
• One opening in the theatre
• Theatrical knife
• One directly responsible for health cuts?
• Operating room tool
• "Doctor Strange" prop
• Probe filthy place occupied by tenant?
• Clasp loose on the Spanish knife
• Probe Little Pigs' holiday home?
• Muscle such as that controlling eye’s pupil