Related Clues:

• How one model's not of ten, perhaps
• Ungrammatically sold them, by the sound of it, not 15 across
• Not of ten
• Seldom if ever with difficulty, perhaps
• 1 down models get confused
• Not of ten for such models
• Not of ten models
• Models are not made of ten
• Models posing rarely
• New Dome's taking in London's capital rarely
• Fashion models rarely showing up
• One miscreant said to squander a moment on it's very unusual
• Models (anag)
• Models fashioned now and then
• Almost never related to astronomy!