Possible Clues:

• Crossword puzzle, e.g.
• Mapmaker's aid
• Gee! Free of such a thing over the map
• Bars used to make one in Greek island close to mainland?
• Street plan, e.g.
• Where to enter this puzzle's answers
• Graph-paper design
• Gee! Dispose of it on the map
• Network of horizontal and vertical lines
• The framework is good and clear