Related Clues:

• Ahead of the curve
• Aware, in slang
• In the know, in old slang
• Lead-in for cat
• Often-replaced joint
• Large joint
• Replacement part?
• In the know, daddy-o
• Not square, once
• Holster's location
• Haunch
• With it, old-style
• Rose's fruit
• Slangily stylish like rose fruit
• Informally in the latest fashion