We all know about the Great Indian Nations but you may not be real familiar with these nations. Some clues are direct meanings / synonyms while others are a bit on the playful side as indicated by a question mark.

Example: They've seen the light! -> illumination
-1. The experience of being isolated from a group (10)
-2. A mirage or pink elephant (13)
-3. Has a collection of
Rabbits,
Goats and
Roadrunners? (9)
-4. Is in a state of inactivity (10)
-5. Face value (12)
-6. The skillful and effective interaction of movements (12)
-7. A place full of dikes and levees? (9)
-8. A thing that causes disgust or hatred (11)
-9. Fantasy (11)
-10. I want to give you this clue but I'll wait until tomorrow (15)
-11. Check this one out! (11)
-12. The state of being awed (11)
-13. A place where everyone acts as though they're someone else? (13)
-14. A place for The Big Sleep? (11)
-15. May have the fountain of youth here? (12)
-16. Unfair treatment of a person or group on the basis of prejudice (14)
-17. Sounds like this nation makes a lot of sacrifices? (11)
-18. Descendants of Le Brea? (9)
-19. Sounds like a place with a lot of money...or bread perhaps? (8)
-20. Resolve (13)