Possible Clues:

• Hell in one area of Ethiopia, formerly
• Old country name void - one gets own back
• Through small error, I smash into drivers in the country
• Bias, say, in corrupt old state
• Very great depth in one, a nation of old
• Something deep in Iowa, old-style country
• Great hole in one — amazing start in old country
• Land a hole in one, an amazing start!
• Profundity in one Across suggests Scoop setting
• Home of a certain cat breed