Possible Clues:

• Fear that's for nothing but a dog
• Volunteer to provide inventory of property
• Tommy, the dog?
• Volunteer soldier, one who endeavours to protect Her Majesty
• Screen's Toto, for one
• The little dog would do wrong to be in such a row (7)
• Dog breed
• One producing 50-Across
• Boston or wirehair
• Do wrong to get in such a beastly row