Related Clues:

• Make stronger
• Tie up in knots
• What angry dogs do
• Motorist's headache
• Hair woe
• What traffic and dogs do
• Another reel problem
• "Grrr!" is one
• Angry dog's warning
• Speak harshly
• Guard dog's warning
• Involve, as in a sticky situation
• Refines, in a way
• Lock problem
• Thicken, as a mystery