Related Clues:

• Fake
• Counterfeit
• Bogus
• Bogus: Var.
• Insincere
• Not genuine
• Not for real
• Insincere (Var.)
• Sham, not genuine
• Sham or insincere
• Not genuine, sham
• Sham, not genuine or sincere
• Of 31 across? No, that's false
• False, soft, sweet and dialable, perhaps
• Sounds soft, sweet, soft and ringing, by the sound of it