The Clue "___ OK PLEASE" : Appeal on trucks on Indian roads
The Answer HORN
The answer "HORN" fits the clue "___ OK PLEASE" because it is a common phrase seen on trucks in India. Drivers often use their horns to communicate with others on the road. The phrase suggests that the driver is asking others to honk their horn if everything is okay. This makes "HORN" a perfect match for the clue.