Related Clues:

• Replacement grass, perhaps
• Root spot
• Putting green patch
• Foundation of farming
• Clump of turf
• Lawn component
• Earth; stain
• The ground is dirty
• I have the sun going round the earth!
• Dirty ground
• Sward
• Spot special lubricant
• I put in 'Sun' -- correct answer is 'Earth'
• Dirty, therefore I left
• Don't clean for the likes of 34 across