Related Clues:

• Too smooth-talking
• Frozen and slippery
• Covered with grease
• Like some wintery roads
• Overly greasy
• Like Arctic waters
• Smooth topsoil -- yucca provides cover
• Overly smooth-talking
• Subject to skidding
• Dangerous, in a way
• Overly smarmy
• Very chilly
• Obsequious, in a way
• Cold, as a stare
• Well lubricated