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

1. Using influence
2. Change address
3. Terminate
4. Work as a team
5. Survive, as a serious illness
6. Rescue at the last moment
7. Very difficult
8. Give 100%
9. Trick or deceive
10. Get gloomy
11. Like some sweaters
12. Not be frank
13. Do your part

Answers:

1. Pulling strings
2. Pull up stakes
3. Pull the plug on
4. Pull together
5. Pull through
6. Pull out of the fire
7. Like pulling teeth
8. Pull out all the stops
9. Pull a fast one
10. Pull a long face
11. Pullovers
12. Pull punches 
13. Pull your weight

Credit: LA Times Crossword
Sylvia Bursztyn and Barry Tunick
YANKS