The Clue Waterfall spray at Khandala in August, perhaps
The Answer MIST
The clue mentions "waterfall spray," which is often associated with mist created by falling water. Khandala is a popular hill station in India, known for its beautiful waterfalls, especially during the monsoon season in August. During this time, the waterfalls are more powerful, creating a lot of mist in the air. Therefore, "MIST" fits perfectly as it describes the spray from the waterfall in Khandala during that time.