What do the answers to the clues below have in common?

1. Work by Chaucer
2. Tabula rasa
3. Becomes hackneyed
4. Seventh commandment command
4. Not necessarily ranked by importance

Answers:

1. Canterbury Tales
2. Clean slate
3. Grows stale
4. Thou shalt not steal
5. Last but not least

Answer:

The answer phrases each contain words that are anagrams of each other:
TALES, SLATE, STALE, STEAL, and LEAST all are made up of the same five letters. 

Credit:
Joy M. Andrews