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

1. Candidate's dream
2. Canaan, to Abraham
3. Precedent-setting court case
4. Geographical features
5. October 12, 1492 - for one
6. Like many colleges, formerly
7. Realm of sleep and dreams
8. Asia is the biggest on earth
9. Type of painting or architecture
10. Euphemistic dump
11. Rent royalty

Answers:

1. Landslide victory 
2. Promised Land
3. Landmark decision
4. Lay of the land
5. Landfall
6. Land-grant
7. Land of Nod
8. Land mass
9. Landscape
10. Landfill
11. Landlords and landladies

Credit: LA Times Crossword
Sylvia Bursztyn and Barry Tunick
TERRITORIAL (Idea and #1-4)