Related Clues:

• A little too silky, maybe
• Fluent and flippant
• Printing libellous piece that's plausible
• A bit too articulate, perhaps
• A little too slick
• Smooth-talking, plausible
• Fast-talking major holding line up
• Well-spoken but insincere
• Good book plausible on the surface
• Breezily unconcerned
• Insincere, easily said
• Fluent but insincere; plausible
• Fluent but shallow, it’s stocked by lending library
• Smooth but unconvincing
• Supremely superficial