Related Clues:

• Tom reading aloud from a register creates reaction
• Agent for change
• Chemical influencing change
• Something that aids change
• Tom, say, getting a set of items, we hear -- engineer of change?
• Speeds up the action for players entertaining Italy tip-off
• What sets things in motion
• Agent taking one pound from sum received by actors
• Substance aiding a reaction
• It initiates a chemical reaction without itself being affected
• Agent promoting change
• Promoter of change, one leaving country in company of actors
• Agent who changes players going round country with no capital
• It initiates a reaction without itself being affected
• Stimulus for a reaction