Possible Clues:

• Vex one briefly slowing in speed
• Bug, furious, keeps slowing down
• Angry about IT after computer's last bug
• Bother
• Anger and fury about dreadful trait
• Needle slowing jabs up in arms
• Annoy, anger
• Provoke and mock bishop coming in for mass
• Scientists taking time to bisect livid bug
• Round robin's first with it, seeing red bug