Possible Clues:

• In the smell of this, by the sound of it, I have enough to spur me on
• A motivation
• Accepted money I've offered as extra payment
• One new coin I have taken for carrot
• Carrot? That's original with one hundred for the initial victory
• At home there's a little money I've added for an enticement
• Something that motivates
• Inducement I have to get in money first
• It encourages popular change for Americans, I have to conclude
• Carrot, so to speak