Related Clues:

• Incentive to revamp slum site lacking sign of expenditure around university
• Strung-out Louis must drop round for shot in the arm
• Something that acts as an incentive
• Something that rouses to action
• It evokes a reaction
• Arousing thing?
• Object or event that causes a response
• Good sort, this person's high-class, with endless desire for encouragement
• It elicits a response
• Litmus produced given US incentive
• Something arousing? Aroused, I must cut sexual desire
• Something that arouses activity or energy
• Spark is appropriate around Scottish chimney, on reflection
• One causes a reaction
• Reaction producer