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

1. Persevere, finish, hang in there , etc. - three words
2. "Let's _____" - dance partner's request - four words
3. "_____  _____  Beethoven" - Chuck Berry classic

Answers:

1. Stay the course
2. Sit this one out
3. "Roll Over Beethoven"

What the answers have in common:

"Stay," "Sit," and "Roll over" are dog commands.

Credit:
Gloria and Larry Hanigofsky
IT'S A DOG'S LIFE