Related Clues:

• Dirty fighter
• Dracula, at times
• Bad dog
• Snake, for one
• Flea or gnat
• Cur
• Junkyard dog, often
• Unfriendly pet, perhaps
• Guard dog, e.g.
• Junkyard dog, most likely
• Ill-trained dog, perhaps
• Angry canine, e.g.
• Craftsman
• Nail-___ (tense situation)
• Snake, by nature