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

1. Easy!

2. A really disagreeable, unreasonable person

3. What you might call your car if it won't start

3. What you want if you want to be part of what' going on 

4. What you would like to give to somebody who as make you angry

Answers:

 

1. Piece of cake

2. Piece of work

3. Piece of junk

4. Piece of the action

5. Piece of your mind