Possible Clues:

• Large estate for crops
• Sugar source
• Perhaps King's Cross not initially shown on map as growth area
• Map army can carry round to find area with trees, say
• Estate office has scheme to replace its head
• Pressure on national bats circling entrance to Tottenham's growing estate
• Coffee-growing estate
• Scheme put forward by director once regarding land for crops
• Place tenant finally found in a country estate
• Farm on plain somehow filled with rubbish