Each clue below can be answered with an expression that ends with the name of a body part. For example, "With true feeling" could be answered with "From the bottom of your heart."

1. Reward, as for one's capture
2. A few hours to kill, say
3. Unlimited opportunities
4. Relief from a nagging worry
5. Nervous, as before giving a talk or performance
6. Extremely narrow margin, as in an escape
7. Soooo close to remembering something

Answers:

1. Price on your head
2. Time on your hands
3. The world at your feet
4. Weight off your shoulders
5. Butterflies in your stomach
6. By the skin of your teeth
7. On the tip of your tongue 

Credit 1-3:
Diane Baldwin