Possible Clues:

• Bad dogs
• Gnats and curs, e.g
• Incisors, for instance
• The bloodsuckers responsible for 1 down
• Vampires, at times
• Black flies, notably
• Nail-__ (tense situations)
• Dangerous dogs
• Teeth, perhaps, ripping 7 from alcoholic additive
• Bit is all they get (6)