The answers to the clues below follow a certain pattern involving wordplay. Can you determine what it is?

1. No longer boring
2. No longer meditative
3. No longer robust
4. No longer lively and assured
5. No longer making an assertion
6. No longer an animal shelter
7. Coins no longer in use
8. Camping shelter to longer in use

Answers:

1. Explain
2. Expensive
3. Exhale
4. Expert
5. Exclaim
6. Expound
7. Exchange
8. Extent