Possible Clues:

• The 30 across of one is just a bit more of it
• Mean dog
• Attack dog, e.g.
• Mosquito, e.g.
• Risky dog to own
• The bit one got served one right
• This gets a bit for just ice, so they say
• Vicious dog perhaps showing a little sign of hesitation
• Pernicious pet
• He who may be bit in tribe