The answers to the clues below will have something in common.

1. Over-fifty organization
2. Complain  constantly
3. Famed lawman
4. Angel's prop
5. Steep slope
6. Slightly ut of tune
7. Ground cover
8. Twist or bend

Answers:

1. AARP
2. CARP
3. EARP
4. HARP
5. SCARP
6. SHARP
7. TARP
8. WARP