Possible Clues:

• Gardening equipment, if lost, would be more concerning
• Harsh critic cries “fair!” unexpectedly
• It's more alarming admitting if one means to break up
• One who criticises what lawn specialist uses
• Ground-breaking invention carries rubbish, if secured
• Earth's destroyer more alarming, if accepted
• It's more frightening if taken for a gardening tool
• One breaking the surface is more alarming, if included