Possible Clues:

• Grassy southwestern plain
• Spanish grassy plain
• It's plain useless, name being removed from Welsh resort
• Plain in the Southwest
• Some diagonal lines drawn up, it's plain to see
• Bolivian plain
• The plain, in Spain
• Plain score draw held up after European's sent off
• Grassy plain in South?America
• Everyone turns up? Not at all — that’s plain