Possible Clues:

• Potential mountain?
• Don't make a mountain out of one, they say
• Don't make a mountain out of one
• Don't make a mountain out of it
• You can make a mountain out of one
• Evidence of digging in the garden?
• Earth mound? It's what the Italian found in Flanders
• Don't make a mountain out of a . . . . . . . .
• Don't make a mountain out of a ........
• Spy given rise? It's importance may well be exaggerated