SUBTRACTION.
1. Subtract to perform duties from cautious, and leave a color.
2. Subtract a contest between two states from a timid person, and leave a fish.
3. Subtract to petition from a useful article, and leave a wager.
4. Subtract the first boat ever launched from an emporium, and leave the past participle of meet.
5. Subtract a name for rail-bird from an island in the Arabian Sea, and leave a small bed.